<s>[INST] out of no where i got a big fluid filled bump on my back, its soft and looks like when you burn yourself and it swells up, it stings and around it is a small red circle and near the spot i have like 5 small red flat dots about the size of a pimple???? [/INST] does it pain.if yes ,it could be herpes zoster.no pain means allergy.apply calamine locally.if not cured  wait for a week.consult your doctor.he will examine physically,make the diagnosis.treatment. </s>