How to grow a lot of small pimples on the body? Is this a wart?

There are many small pimples on my body, and there are many situations. First, scabies. Scabies generally occur in places with thin skin such as fingers, abdomen and thigh roots. It is a kind of scabies infection and an infectious disease spread in close contact. It has something to do with staying in a hotel or living in a dirty environment. Second, it may be eczema. Eczema is an allergic disease, which is related to mites, pollen, dust mites, molds, beef and mutton, seafood and so on. It is also related to self-allergy. Third, it may be a drug eruption, which is an allergic reaction caused by drugs. It is necessary to judge according to the specific manifestations of the rash and find out the cause.