Red and swollen pimples can be treated with topical povidone-iodine, which can prevent secondary infections if broken, if not broken, the therapeutic effect of povidone-iodine is slight. Red and swollen pimples are a manifestation of acne, usually caused by local inflammatory reaction, part of the visible pus, the treatment needs to be used externally with good permeability, with antibacterial effect of the emulsion, gel and so on. Povidone-iodine, as a broad-spectrum disinfectant, can kill most of the bacteria, and is commonly used in the clinic to disinfect the skin and mucous membranes, such as acne breakouts, topical povidone-iodine can prevent secondary infections, but its penetration is poor, and its effect on Propionibacterium acnes in the deeper layers of the skin is slight, and it has no therapeutic effect on inflammatory reactions of acne. If you have red and swollen pimples on your face, you should go to the hospital in time and choose the appropriate medication under the guidance of your physician, avoiding self-treatment.