DR RV ANAND SENIOR NEUROLOGIST CHENNAI MEENAKSHI HOSPITAL POST HERPETIC NEURALGIA it is a painfull condition following herpes zoster infection.it follows eruption along the sensory nerve.it s contagious in the first week after eruption it commonly occurs in diabetics and patients who are taking longterm steroids and immunosuppresents it commonly occurs in the trunk it may also occur over fore head causing visual diasabilty it can occur over the face and cause facial palsy