It's been a long time since I've had a pimple on my back like acne, and it hurts.
According to the picture you gave, this is a typical hair follicle infection. It is recommended that oral antibiotics such as roxithromycin, minocycline, cefuroxime tablets, azithromycin capsules, etc. can be taken, as well as immunomodulators, because folliculitis is often attacked when the immunity of the body is low, so the immunity of the body needs to be improved.You can also apply topical medications such as 2% tincture of iodine, Bactrim ointment, chrysin ointment, fusidic acid ointment, etc. for relief.
It is also called acne, which is related to increased secretion of sebaceous glands and secondary bacterial infections. It is recommended to use topical Bactrim once in the morning and once in the evening or Fusidic acid cream once in the morning and once in the evening under the guidance of a doctor, do not touch water and do not scratch or squeeze.
This situation should be considered whether it is caused by local inflammation, it is recommended that under the guidance of a doctor through anti-inflammatory drugs to improve, such as clindamycin or erythromycin, can play an anti-inflammatory role, but during treatment must pay attention to avoid squeezing, light diet.