The main reason for the pain is the following: 1, the color of the bulge under the chin is red, with pain as the main symptom consider folliculitis, is due to the usual inattention to personal hygiene, or shaving supplies do not pay attention to cleaning, resulting in local hair follicle bacterial infection, inflammation and the formation of oral cephalosporin antibiotics rub erythromycin ointment on the affected area, the inflammation subsides after the bulge can subside. 2, in the The situation can also occur in adolescents or people who usually live and eat irregularly, endocrine disorders and hormone level metabolic disorders, using adapalene gel or clindamycin gel to rub the affected area, change their life, diet habits, the body hormone level back to normal after the bulge can subside. Regardless of which of the above reasons for the formation of the bulge can not be pressed by hand, do not eat spicy, fried food, otherwise it will further spread the inflammation, so that the bulge increases to aggravate the symptoms of redness, swelling and pain.