Are brownish residues at the corners / edges of the mouth a sign that someone has smoked heroine ?
Hi!I don't know about brownish residues at the corners / edges of the mouth but heroin users may develop runny noses and eyes, constricted pupils and spend an unusually large amount of time sleeping or exhibit apathy or lethargy. A regular user may have an unkempt appearance and begin to neglect their hygiene. A heroin user may wear winter clothes during the summer to hide needle marks.