The growth of painless and itchy bumps on the scalp can be seen in the disease of flat warts, which is very common on the scalp. Flat warts are caused by human papillomavirus infection, usually painless, the course of the disease is relatively slow, a part of the natural subside. The flat warts have a certain degree of contagiousness, if the onset of time the longer, the more likely to appear pigmentation and affect the aesthetic, the treatment can be the use of drugs, the use of retinoic acid cream, imiquimod ointment and other drugs lead to warts off, but also to take the physical freezing laser to remove the treatment. If it is more serious, it can be combined with oral medication, such as isotretinoin capsules. You should avoid scratching, avoid picking and squeezing, avoid contact with irritating objects, pay attention to local hygiene, eat a light diet, avoid spicy, stimulating diet, eat more fresh vegetables and fruits, avoid smoking and drinking.