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→Pathological phimosis: wikify lichen sclerosus
In pathological phimosis, the foreskin cannot be retracted over the glans without injury, due to a lack of elasticity caused by scarring or hardening.
Repeated infections of the tight foreskin cause this scarring. Also, forceful attempts to retract the foreskin cause tearing with subsequential scarred [[phimosis]]. [[Balanitis xerotica obliterans| Lichen sclerosus]], that first leads to adhesion and then to shrinking, can also be the cause of [[phimosis]]. This rare, non-contagious chronic skin disease is partly genetically caused and considered incurable.
<ref>{{URLwikipedia|Lichen_sclerosus|Lichen sclerosus|2019-09-25}}</ref>