What Does the Koebner Phenomenon Have to Do With Psoriasis?
Psoriasis is one of the most common skin diseases worldwide. According to the World Health Organization (WHO), psoriasis affects approximately 1% of all adults and 0.5% of children under 15 years old. People suffering from psoriasis are often diagnosed with other chronic skin conditions such as eczema or atopic dermatitis. These conditions are less common than psoriasis but they can cause similar symptoms.
The term “koebner” refers to a type of plaque that forms on the surface of your skin when you have psoriasis. Plaque is not actually a disease per se; it’s just another name for a build up of dead cells called keratinocytes. Keratinocytes produce the protective outer layer of your skin, known as the stratum corneum. When these dead cells accumulate, they form a hard film that prevents water and oil from evaporating out of your body. If left untreated, this buildup will eventually lead to a painful scabbing condition known as psoriatic arthritis.
If you have plaque psoriasis, this process happens at a much faster rate. The constant build up and shedding of your skin can cause an itchy or burning sensation to take place and may even turn your skin red or even blue in extreme cases. In fact, psoriasis is one of the leading causes of itchiness across all demographics and skin types. It’s generally not a painful condition, but it can become very annoying to deal with on a day-to-day basis.
The exact cause of plaque psoriasis is unknown to modern science, although it has been linked to several different risk factors. If you suffer from a family history of psoriasis, you have a higher chance of developing it.
Sources & references used in this article:
Psoriasis sparing the polio-affected limb: Is it merely the koebner phenomenon? by S BC Ravikumar – Indian journal of dermatology, 2014 – ncbi.nlm.nih.gov
Many faces of Koebner phenomenon in psoriasis by S Gupta – Indian Journal of Dermatology, Venereology, and …, 2002 – ijdvl.com
Role of trauma in isomorphic response in psoriasis by EM FARBER, RJ ROTH, E ASCHHEIM… – Archives of …, 1965 – jamanetwork.com
Paradoxical, cupping-induced localized psoriasis: a Koebner phenomenon by R Vender, R Vender – Journal of Cutaneous Medicine and …, 2015 – journals.sagepub.com
The Koebner phenomenon and the microbial basis of psoriasis by EW Rosenberg, PW Noah – Journal of the American Academy of …, 1988 – Elsevier
The isomorphic response of Koebner by AS Boyd, KH Neldner – International journal of dermatology, 1990 – Wiley Online Library
Response to injury of skin involved and uninvolved with psoriasis, and its relation to disease activity: Koebner and ‘reverse’Koebner reactions by RW Eyre, GG Krueger – British Journal of dermatology, 1982 – Wiley Online Library