Phimosis

A condition in which preputial orifice tightness or constriction impedes or prevents full retraction of the foreskin over the glans penis, potentially causing obstructed voiding, balanitis, pain with erection, or other local complications. Possible causes are physiological variant seen in childhood, infection (balanitis), lichen sclerosus (balanitis xerotica obliterans), or injury/scarring (sexual activity).