Pimples 3 days Post Op
It looks like you have folliculitis. I would recommend following up with your doctor to determine whether a course of antibiotics is necessary or not.
You should call your doctor and follow up with your doctor. It may be a sign of early infection, it may be nothing. However, without an exam or a call to your doctor, you may be delaying treatment.
Pimples 3 days after a hair transplant on the recipient area
This is concerning and you should go back to your doctor. Pimples at this stage may reflect early infection and as such requires a doctor to judge what is happening. I can't do it from the internet or from realself.
Pimples after hair transplant
It looks lie you are having in grown hair or folliculitis. You need to do warm compresses for three or four days. If it does not improve, you need to contact your hair restoration surgeon to start on antibiotics.