A bag on the chin is most commonly a folliculitis or a sebaceous cyst. The first thing to do is to see if this large bag has redness, swelling, itching and pain. If the follicle is infected causing redness and swelling, consider folliculitis. If it is not red and swollen, just simple cystic protrusion, sebaceous cysts are more likely. If it is folliculitis, it is recommended to take oral topical anti-inflammatory drugs, after the use of drugs, folliculitis will be localized pus. At this time, the pus will be cleaned out, continue to anti-inflammatory for three days. If it is a sebaceous cyst, it is recommended that the cyst be removed by surgical stripping. Whether it is folliculitis or sebaceous cysts, it is recommended that the doctor diagnose and treat them in person. During treatment, drink plenty of water, rest, do not eat spicy and stimulating food, and keep your skin clean.