Hello, Welcome to HCM. I understand your concern. From the details you have given, I assume that you are suffering from folliculities. The red pus filled pimple you are having on your body are most likely infected follicles(hair roots). There may be many reasons for the same like a previous exposure to sun, excessive sweating, friction due to tight clothing, etc. You need not worry in this matter because most of the time it is benign self limiting condition. You should apply some antibiotic ointment (like povidone) or antibiotic powder (neosporin powder) along with skin soothing lotion like calamine. I advise you to keep the area clean by washing it with warm water and mild soap. You should not wear tight cloths and should not let the follicles excessively compressed or stretched. Avoid scratching or bursting the pus filled follicles. Consult a doctor if they don t go away in 10 days. Please rate this answer helpful if it was helpful to you. Take care.