In May this year I started going to
hookah bar with friends on weekends, initially we were using the same pipe to smoke hookah and two weeks of starting it I had painfull sore inside the lower lip of my mouth, I rushed to walkin clinic and doctor their told me most of the mouth related sores he has seen are STDs but he is quiet sure this no STD and told me its an CANKER SORE and developed due to my internal problems, stress and lack of Vitamin C.