Hello,
These red bumps can be due to allergies, folliculitis (although less likely) or scabies. Scabies is a contagious skin infection caused by a parasite – the mite, which burrows under the host’s skin and causes intense allergic itching. It is transmitted from objects or beddings, but more with direct skin- to – skin contact.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
A couple things online I found were that it might be eczema or a heat rash. Cortisol cream I hear is good for treating that sort of thing.