A hard bump on the head is often a sign of a skin disease, and we should first identify what causes it and then treat it accordingly. The most common type of wart is the common wart, which is also called a wart, and is related to a viral infection, which is contagious. The actual fact is that you will be able to get a lot more than just a few of the most popular and most popular items. You can go to the dermatology department for cryotherapy or laser treatment to solve this problem. We recommend going to the dermatology department of the hospital for physical examination and ultrasound examination to make a clear diagnosis and then give appropriate post-treatment. If the hard bumps are painful, most of them are folliculitis or boils, which are related to the blockage of hair follicle pores and the decrease of skin resistance, and thus the secondary infection. You can take cephalosporin antibiotics orally and use topical antibiotic creams, such as Bactrim and Neomycin ointment, to relieve the symptoms.