Injury induced hypertrichosis Injury induced hypertrichosis references Injury induced hypertrichosis It has been known for many years that any form of injury will force telogen hair follicles into anagen growth in and around the site of injury. This growth is temporary, as the injury heals so the hair follicles go back to normal. Accidental injury in humans and other mammals has long been known to promote anagen in hair follicles. The periphery of burned areas can develop hypertrichosis as surviving hair follicles respond to the wound repair stimuli.
Insect bites are also a form of injury that can sometimes promote localized hair growth.
Topical irritants through promoting inflammation may cause effects similar to physical injury that promotes hair follicle growth. Severe hypertrichosis as an uncommon feature of juvenile dermatomyositis. J Am Acad Dermatol. Hypertrichosis in juvenile dermatomyositis. J Am Acad Dermatol.