The underlying cause of dermographism is not known, and can last for many years without relief. Ninety-five percent of chronic cases are never solved. Sometimes the condition goes away, sometimes it stays forever. It is not a life-threatening disease and is not contagious (transferable to other persons).
Symptoms can be induced by stress, tight or abrasive clothing, watches, glasses, heat, cold, or anything that causes stress to the skin or the patient. In many cases, it is merely a minor annoyance, but in some rare cases symptoms are severe enough to impact a patient's life.
Dermographism can be treated by antihistamines, which prevent histamine from causing the reaction. These may need to be given as a combination of H1 antagonists, or possibly with an H2-receptor antagonist such as cimetidine.
Not taking hot baths or showers may help if it is generalized (all over) and possibly for localized (in a specific area). If not taking showers helps, it may be a condition called shower eczema. If it affects mainly the head, it may be psoriasis. In rare cases, allergy tests may uncover substances the patient is allergic to. Using biodegradable or hypo-allergenic soaps and laundry supplies may help.
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