White bumps on the hands may be the manifestation of hives, flat warts and other diseases. 1. hives: may be related to food or drug allergies, infections and other factors, most of the acute onset of the disease, the patient suddenly appeared itching, and then the local will appear in varying sizes of red or pale white wind, can be distributed all over the body, the patient so that the phenomenon of long white bumps on the hands. 2. flat warts: a kind of benign skin proliferation caused by the human papilloma virus, manifested as flat slightly elevated papules, can be skin color, yellowish, light brown, touch the surface of the roughness, occurring in the hand, there can be hand long white bumps performance. There are many causes of white bumps on the hands, patients are advised to go to the hospital and clarify the cause of the disease.