Knight Dermatology Institute | Medical Conditions
Dr. J. Matthew Knight practices Cosmetic and Clinical Dermatology services including Lumenis™ FX CO2 Fractional Laser, laser hair removal, Botox™ injections, soft tissue fillers, cosmetic and spa services at the Knight Dermatology Institute in Orlando, Florida. He serves patients in all surrounding counties including Seminole, Marion, Brevard, Volusia, Osceola and Lake counties.
Dermatologist, Dr. J. Matthew Knight, Cosmetic Dermatology, Clinical Dermatology, Dermatology, Lumenis FX CO2 Fractional Laser, laser hair removal, Botox™ injections, soft tissue fillers, cosmetic, spa services, Knight Dermatology Institute, Orlando, Sanford, Winter Park, Longwood, Maitland, Kissimmee, Windermere, Seminole County, Marion County, Brevard County, Volusia County, Osceola County, Lake County, Florida
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Medical Conditions

Below are conditions we treat at the Knight Dermatology Institute. Click on any of the links to learn more about the condition and how we can treat it. If you do not see your condition below or need more information, please call or contact us through our contact form and we will assist you in finding your solution.  Please note that not all treatments are suitable or recommended for all patients.  Patient treatment options can only be offered after an evaluation by a medical practitioner.


Hyperpigmentation is a condition in which certain areas of the skin become darker than the surrounding areas. This condition is quite common, is thought to be harmless, and can occur in people of any race. The darkening takes place due to an excess amount of melanin, which gives skin its normal pigmentation.


Age spots and freckles are common forms of hyperpigmentation. The sun can make already discolored skin appear even darker, so the use of a broad-spectrum sunscreen should be used when sun exposure is expected. Even one day of unprotected sun exposure can undo several months of treatments.


Prescription creams containing hydroquinone and creams containing tretinoin and cortisone have been used with success to reduce the appearance of hyperpigmentation. These creams will take anywhere from three to six months to work.


Laser and Intense Pulsed Light (IPL) treatments are often used to reduce pigment with little or no scarring. The latest laser to address hyperpigmentation is fractional CO2 (Lumenis FX™). Using state-of-the-art bridge therapy to create a favorable safety profile, the FX laser system has become the gold standard for correction of hyperpigmentation. Both the PigmentFX™ and ActiveFX™ protocols are aimed at this common skin condition, and the results are unmatched by any laser system or procedure currently available.


Lentigos are brown spots that appear on the skin primarily due to the sun. These spots have very little to do with age; they are caused by cumulative UV exposure.


Lentigos develop on the skin due to melanin deposits. Melanin is the pigment in our skin: it absorbs light and gives our skin its color.


We offer several treatment modalities to help remove lentigos and age spots.  Topical creams, such as hydroquinone, and laser treatments are quite effective at treating superficial lesions.


Treatment with an Intense Pulsed Light (IPL) device, Pulse Dye laser, or Q-switched Nd:YAG laser offers more durable results. Laser and IPL treatments are very effective and results are usually permanent. In most cases, two or more sessions are needed to completely remove the unwanted spots.


The fractional CO2 laser (Lumenis FX™) is the latest, and most comprehensive, tool in removing lentigos. While slightly more aggressive than other laser treatments, nothing can approach the effectiveness of the Pigment FX/Active FX treatment protocols to clear unwanted blemishes on the skin. While tremendously effective, this procedure has been proven very safe.


New age spots can develop, especially with repeated sun exposure. Sunscreen, proper clothing and wide-brimmed hats should be worn on a regular basis.


Skin cancer is a malignancy that forms in the tissues of the skin. More than 20 Americans die each day from skin cancer, primarily melanoma. One person dies of melanoma almost every hour (every 62 minutes).


Prevention is key to avoiding skin cancer. Wearing protective clothing, such as light-colored, long-sleeved shirts, pants, and hats, as well as the use of broad-spectrum sunscreen helps reduce UV exposure. Avoiding sunburns is extremely important.


At the Knight Dermatology Institute, we specialize in detection and treatment of all skin cancers. In addition, regular self-screening skin exams are imperative to detecting skin cancer in its earliest, and most easily treated stage.


Treatment is often surgical (excision), but newer therapies include topical immunotherapy and photodynamic therapy (PDT). Treatment is often very successful, but the outcome depends on site, severity, and stage of cancer.


According to the Skin Cancer Foundation


  • Skin cancer is the most common form of cancer in the United States. More than one million skin cancers are diagnosed annually.


  • One in five Americans will develop skin cancer in the course of a lifetime.


  • Basal cell carcinoma (BCC) is the most common form of skin cancer; about one million of the cases diagnosed annually are BCCs. BCCs are rarely fatal, but can be highly disfiguring.


  • Squamous cell carcinoma (SCC) is the second most common form of skin cancer. More than 250,000 cases are diagnosed each year, resulting in approximately 2,500 deaths.


  • BCC and SCC are the two major forms of non-melanoma skin cancer. Between 40 and 50 percent of Americans who live to age 65 will have either skin cancer at least once.


  • About 90 percent of non-melanoma skin cancers are associated with exposure to ultraviolet (UV) radiation from the sun.


In regards to malignant melanoma:

  • The incidence of melanoma is increasing faster than that of almost any other cancer.


  • Approximately 62,480 melanomas will be diagnosed this year, with nearly 8,420 resulting in death.                 
    Men: 34,950 incidences/5,400 deaths
    Women: 27,350 incidences/3,020 deaths


  • Melanoma accounts for about three percent of skin cancer cases, but it causes more than 75 percent of skin cancer deaths.


  • Melanoma mortality more than doubled from 1950-2004.


  • The survival rate for patients whose melanoma is detected early (before it has reached the lymph nodes) is about 99 percent. The survival rate falls to 15 percent for those with advanced disease.


  • Melanoma is the sixth most common cancer for males and seventh most common for females.


  • Melanoma is the second most common form of cancer for young adults 15-29 years old.


  • About 65 percent of melanoma cases can be attributed to ultraviolet (UV) radiation from the sun.


  • One in 55 people will be diagnosed with melanoma during their lifetime.


  • One blistering sunburn in childhood or adolescence more than doubles a person’s chances of developing melanoma later in life.


  • A person’s risk for melanoma doubles if he or she has had five or more sunburns at any age.

Facial veins (also called rosacea, capillaries, telangiectasia) can appear in both men and women and can become darker and more noticeable over time. It is estimated that as many as twenty percent of people in their twenties and as many as fifty percent of people in their fifties have unsightly facial veins.


What are the causes of Rosacea?


Facial veins are caused by many factors including genetic predisposition, hormonal changes, steroid creams, ultraviolet rays, exposure to extreme temperature conditions, the wind, pregnancy, and skin conditions such as rosacea. It is not necessary to live with these annoying veins or try to cover them up continually with makeup. Laser facial vein removal is a safe, relatively painless way to achieve a beautiful result.


How are Facial Veins, Facial Capillaries & Rosacea Removed?


Facial vein removal requires no surgery and no incisions. It is performed using a Candela® VBeam 595nm Pulse Dye laser, considered to be the gold standard therapy for this problem.


  • This light is very concentrated and is applied in brief pulses to the areas affected by rosacea.


  • The laser targets just the facial veins to be removed and seals them shut allowing the body to reabsorb them, causing them to disappear.


  • An advanced rosacea treatment technique, called pulse stacking, helps minimize any bruising that may occur after the treatment.


  • The entire rosacea treatment generally takes about ten minutes and is relatively painless.


  • Each short pulse of light feels like a small snap from a rubber band. Normal activities can be resumed following the rosacea treatment procedure.


  • Most patients require one to three ten-minute rosacea treatments, spaced four to six weeks apart.


What are the side effects from Candela® VBeam Rosacea treatments?


There are very few side effects from the procedure. The most common side effects include bruising, swelling and redness of the treated area. Rarely, light scabbing, tenderness, and/or temporary skin darkening can result. Serious side effects, such as scarring, are extraordinarily rare.


Warts are skin growths that develop due to a viral infection (human papillomavirus – HPV) in the top layer of the skin. These growths are non-cancerous, are usually skin colored, and feel rough to the touch. There are many types of warts including: common, which grow on the hands, fingers and around the nail areas; plantar, which usually grow on the bottoms of feet and can be painful; and flat, which tend to grow on the face, are smaller than other warts and tend to grow in large numbers of twenty to one hundred at a time.


Warts are passed from person to person, and contact does not have to be direct. As with any type of virus, some people are more prone to infection than others. These growths tend to occur more frequently on skin that has been damaged in some way, such as if a hangnail is plucked or a small cut is present. Warts can disappear spontaneously without treatment, however if the growth is painful, bothersome, or appears to be multiplying, it should be removed.


There are a multitude of treatments available for the removal of warts. Common warts can be removed by treating them with salicylic acid that can be applied at home. However, freezing (also known as cryotherapy) has proven to be more effective. Cryotherapy is minimally painful and scarring is uncommon.


Other treatments include electrosurgery, which burns the growth off of the skin, and cantharidin, which causes a blister to form. Topical creams that alter the local immune system, such as Aldara and Efudex, have also been used with some success.


A newer treatment offered at the Knight Dermatology Institute is Pulse Dye laser therapy, with or without aminolevulinic acid (ALA). Using a novel approach, this laser targets increased blood vessels in warts. Eliminating these vessels starves the wart, thereby causing viral cell death. This treatment is reserved for recalcitrant warts that have not responded to traditional therapies.


Finally, our CO2 laser can be used to vaporize the most resistant of warts.


Psoriasis is a persistent, inflammatory condition of the skin. It is not contagious, but it is a hereditary condition that can be passed on from generation to generation. While the exact cause of this skin condition is unknown, it is believed to be an immune system disorder of over-active T-cells. Triggers usually cause psoriasis to appear or flare: these include injury to the skin (such as a cut, scrape, sunburn), cold, dry weather, infections, and certain medications.


There are five main types of psoriasis:


  • Plaque, which is the most common form, appearing on the knees, elbows, scalp, lower back, as well as other places on the skin, and appears as patches or raised, reddish, scaly skin


  • Guttate, which appears as small red spots, typically affecting children and young adults, and usually occurs after a sore throat


  • Pustular, which appears as white pustules surrounded by red skin, is usually located on the palms of the hands and soles of the feet


  • Inverse, which appears as smooth, red lesions in the folds of the skin such as in the armpit area, breast areas, buttocks, genital area, and around the groin


  • Erythrodermic, which causes widespread redness, pain, and severe itching.


Psoriasis cannot be cured, but it can be effectively treated and controlled. There are a number of treatment methods including the use of:


  • Topical creams and solutions, light therapy and systemic therapy, corticosteroids, anthralin, calcipotriene, retinoids, and coal tar are some of the topical products used to treat this condition.


  • Biologic medications (i.e. Embrel, Raptiva, Humira) are the latest agents available in the treatment of psoriasis; these drugs target only the specific part of the immune system responsible for psoriasis (i.e. TNF-alpha) instead of suppressing the entire immune system.


  • Systemic treatments (i.e. methotrexate, cyclosporine), which suppresses the entire immune system, are also effective. These treatments are used for patients with very severe cases that cannot be controlled with other medications. Close monitoring is required due to the potential of serious side effects.

Acne is a common human skin disease that, while prevalent during adolescence, can affect adults as well. Acne appears most often on the face but it can also appear on the neck, chest, back, and upper arms. Acne develops when naturally-occurring skin oils called “sebum,” along with dead skin cells, clog hair follicles and/or pores in the skin. The clogged pores create an ideal environment for bacteria on the skin, which exacerbates pimples, whiteheads and the other symptoms of acne. Acne is an equal opportunity condition that affects men and women of all races.


What are the symptoms?


Acne symptoms vary widely, both in the severity of blemishes and the areas affected. Some people may get a few blemishes such as pimples, whiteheads or blackheads. More severe blemishes include papules, blemishes that contain pus or other fluid, called pustules, and nodules, or firm lesions under the skin. These can all occur in localized areas or in large patches on the face, back, chest, neck, shoulders, upper arms, and buttocks.


Who gets it?


Worldwide, acne affects approximately 650 million people, making it the world’s most prevalent skin condition and the eighth most common disease overall. Individuals looking to improve their skin, even out their skin tone and reduce acne scars are the prime recipients of acne peel treatments. This treatment is also common for individuals seeking younger, healthier looking skin.


Treatment Options


If you have acne, the skin experts at Knight Dermatology Institute can develop a treatment plan that is safe, effective and personalized for your health needs and the condition of your skin.

Seborrheic Dermatitis

That red, itchy rash on your scalp that has flaky scales could be seborrheic dermatitis or seborrhea. It’s a common skin disease that looks similar to psoriasis, eczema, or an allergic reaction. And it can appear on your body as well as your scalp.  Seborrheic keratosis can be hereditary, with older people at higher risk. It’s also possible to develop these growths through frequent exposure to the sun.  Knight Dermatology Institute can determine the best possible course of action to treat seborrheic keratosis.

Eczema (Atopic dermatitis)

Eczema, also known as dermatitis, is a common skin condition characterized by the inflammation, swelling or irritation of the skin. Eczema affects as many as 35 million Americans. Eczema is not dangerous, but it can cause significant discomfort if the skin itches. When that happens, the condition may worsen if the eczema is scratched.


Atopic dermatitis, or atopic eczema, is the most common form of eczema and is often found in babies and children.


According to the American Academy of Dermatology, up to 20 percent of children and one to three percent of adults will develop atopic eczema. Eczema is an equal opportunity condition that does not favor males or females. Although atopic eczema is most common in babies and children, it can also appear during puberty or throughout adulthood. Most of the infants who develop eczema are likely to outgrow it by their 10th birthday, though some eczema sufferers have lifelong symptoms.


A family history of eczema can also play a part in determining whether the condition will develop. Children with asthma or hay fever, or adults who develop asthma or hay fever before age 30 also seem to be more susceptible to eczema. Many adults experience eczema symptoms in times of stress. And while stress can trigger eczema, eczema can also trigger stress, which occurs when the affected skin is visible, leading to social stigma over the appearance of the condition.


The onset of eczema is often characterized by itchiness in the area of the skin that will be visibly affected. Eczema is not contagious and may develop in any other area of the skin as well. When eczema occurs it is characterized by dry, scaly, flaky or thickened skin that is reddish and may turn brown. Conversely, those people with darker skin may see the affected area become lighter in color. Eczema can be cyclical with intermittent flare-ups. Infants most often suffer from eczema on the face and scalp, although like adults, it may appear anywhere.


Treatment Options


Though there is no cure for eczema, its effects can be controlled through diligent care. Knight Dermatology Institute will work with you to determine a treatment plan that works best for you.  Treatments can include topical steroids, non-steroid drugs, and phototherapy.