Without examination, confirmation of a diagnosis is tough but it can be contact dermatitis, rash due to friction rub, folliculitis, cysts or molluscum contagiosum(multiple, small, dome-shaped papules, often with a central depression or plug). The blood filled bumps can be due to blood blisters or pyogenic granuloma.
Apply warm compresses, Neosporin ointment and calamine lotion and wear cotton clothes. You can take anti-inflammatory pain killers like ibuprofen or acetaminophen. If the lumps persist then it will be best to get it evaluated from a dermatologist.
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.