Men with lumps under the pubic hair may be folliculitis, cysts, lipomas, etc., which need to be judged according to the specifics of the lump as well as the examination. 1. Folliculitis: folliculitis is the most common cause, do not pay attention to personal hygiene, resulting in hair follicle infection, will form inflammatory masses, mostly accompanied by redness, swelling and pain. 2. Cysts: after the hair follicles are blocked, cysts may be formed and thus form lumps, which can be clarified by ultrasound examination. 3. Lipoma: Subcutaneous lipoma may also appear in male pubic hair area, usually without pain and discomfort. All in all, men need to pay attention to the swelling under the pubic hair, go to the hospital in time to check, clear the cause of the disease for targeted treatment.