Table of ContentsView AllTable of ContentsPsoriasisEczemaLichen PlanusVitiligo
Table of ContentsView All
View All
Table of Contents
Psoriasis
Eczema
Lichen Planus
Vitiligo
Koebner’s phenomenon, also called isomorphic phenomenon or isomorphic reaction, is seen most often inpsoriasis,eczema, lichen planus, and vitiligo.
This photo contains content that some people may find graphic or disturbing.See PhotoPsoriasis on elbows.Jodi Jacobson / Getty Images
This photo contains content that some people may find graphic or disturbing.See Photo
This photo contains content that some people may find graphic or disturbing.

Psoriasis is a common skin condition that changes the life cycle of skin cells. Psoriasis causes cells to build up rapidly on the surface of the skin. The extra skin cells form thick, silvery scales and itchy, dry, red patches that are sometimes painful.
Psoriasis is a persistent, long-lasting (chronic) disease. There may be times when yourpsoriasis symptomsget better alternating with times your psoriasis worsens.
The primary goal of treatment is to stop the skin cells from growing so quickly. While there isn’t a cure,psoriasis treatmentsmay offer significant relief. Lifestyle measures, such as using a nonprescription cortisone cream and exposing your skin to small amounts of natural sunlight, also may improve your psoriasis symptoms.
This photo contains content that some people may find graphic or disturbing.See PhotoDiscoid eczema rash.OlegMalyshev / Getty Images

No cure has been found for eczema. Buttreatmentsand self-care measures can relieve itching and prevent new outbreaks. For example, it helps to avoid harsh soaps and other irritants, apply medicated creams or ointments, and moisturize your skin.
See your healthcare provider if your eczema symptoms distract you from your daily routines or prevent you from sleeping.
This photo contains content that some people may find graphic or disturbing.See PhotoLichen Planus.TimoninaIryna / Getty Images

Most people can manage typical, mild cases of lichen planus at home without medical care. If the condition causes pain or significant itching, is severe or widespread, and/or is in certain areas (e.g., the genital area), you will likely need to use a prescription drug.
This photo contains content that some people may find graphic or disturbing.See PhotoVitiligo.Axel Bueckert / EyeEm / Getty Images

Vitiligois a disease that causes the loss of skin color in blotches. The extent and rate of color loss from vitiligo is unpredictable. It can affect the skin on any part of your body. It may also affect hair, the inside of the mouth, and even the eyes.
Vitiligo affects people of all skin types, but it may be more noticeable in people with darker skin. The condition is not life-threatening or contagious. Treatment for vitiligo may improve the appearance of the affected skin but does not cure the disease.
9 SourcesVerywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read oureditorial processto learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.Sanchez DP, Sonthalia S.Koebner Phenomenon.In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2021 Jan-.National Psoriasis Foundation.What is psoriasis?Mayo Clinic.Psoriasis—Symptoms & Causes.Mayo Clinic.Psoriasis—Diagnosis & Treatment.National Eczema Association.What is Eczema?American Academy of Dermatology Association.Lichen Planus: Signs and Symptoms.Usatine RP, Tinitigan M.Diagnosis and treatment of lichen planus.Am Fam Physician. 2011 Jul 1;84(1):53-60. PMID: 21766756.American Academy of Dermatology Association.Vitiligo: An Overview.Mayo Clinic.Vitiligo.
9 Sources
Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read oureditorial processto learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.Sanchez DP, Sonthalia S.Koebner Phenomenon.In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2021 Jan-.National Psoriasis Foundation.What is psoriasis?Mayo Clinic.Psoriasis—Symptoms & Causes.Mayo Clinic.Psoriasis—Diagnosis & Treatment.National Eczema Association.What is Eczema?American Academy of Dermatology Association.Lichen Planus: Signs and Symptoms.Usatine RP, Tinitigan M.Diagnosis and treatment of lichen planus.Am Fam Physician. 2011 Jul 1;84(1):53-60. PMID: 21766756.American Academy of Dermatology Association.Vitiligo: An Overview.Mayo Clinic.Vitiligo.
Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read oureditorial processto learn more about how we fact-check and keep our content accurate, reliable, and trustworthy.
Sanchez DP, Sonthalia S.Koebner Phenomenon.In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2021 Jan-.National Psoriasis Foundation.What is psoriasis?Mayo Clinic.Psoriasis—Symptoms & Causes.Mayo Clinic.Psoriasis—Diagnosis & Treatment.National Eczema Association.What is Eczema?American Academy of Dermatology Association.Lichen Planus: Signs and Symptoms.Usatine RP, Tinitigan M.Diagnosis and treatment of lichen planus.Am Fam Physician. 2011 Jul 1;84(1):53-60. PMID: 21766756.American Academy of Dermatology Association.Vitiligo: An Overview.Mayo Clinic.Vitiligo.
Sanchez DP, Sonthalia S.Koebner Phenomenon.In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2021 Jan-.
National Psoriasis Foundation.What is psoriasis?
Mayo Clinic.Psoriasis—Symptoms & Causes.
Mayo Clinic.Psoriasis—Diagnosis & Treatment.
National Eczema Association.What is Eczema?
American Academy of Dermatology Association.Lichen Planus: Signs and Symptoms.
Usatine RP, Tinitigan M.Diagnosis and treatment of lichen planus.Am Fam Physician. 2011 Jul 1;84(1):53-60. PMID: 21766756.
American Academy of Dermatology Association.Vitiligo: An Overview.
Mayo Clinic.Vitiligo.
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