There are actually many types of bumps on the body in clinical practice. The most common one may be hives, which are mostly formed due to allergies. The most common may be the result of ingesting certain allergens or inhaling certain allergic particles, so there are certain metabolic changes in the skin, and this metabolic reaction is mainly due to the mast cells of the skin producing degranulation, so substances such as histamine are released. These histamine substances, which may irritate the surrounding skin tissues, produce local edema and eventually form wind bumps. Of course, these bumps may also be pimples or papules, which may be caused by infections or allergies. In terms of infections, the most common ones may be viral rashes due to viral infections, measles due to infection with the measles virus, or rubella due to infection with the rubella virus, etc.