ForumsAcne and its treatm...Hyperpigmentation -...Red mark (acne shap... Notifications Clear all Red mark (acne shape) is not disappearing after 1 monthblacksword MemberMember0(@blacksword) Posted : 05/15/2017 5:05 pm hi guys i have a red mark on my shoulder which is not disappearing after a month but the size is not changing no itch no pain ... nothing. Is it necessary to take an appointment ? i attached three pictures of it.thanks Quotebeautifulambition MemberMember1750(@beautifulambition) Posted : 05/20/2017 4:30 am I'd go see a dermatologist. This could be numerous things. Quote