If it's a sore, please! Symptoms are itching, and purulent secretions flow out from time to time! Furuncle over time. There are many treatments at present. I suggest you go to the dermatology department of the epidemic prevention station to find a doctor (note: it is generally more economical there, because it is a minor problem, there is no need to make a fuss. Pay attention to the qualifications of doctors. Poor medical ethics and indiscriminate prescription of drugs are not affordable)
Folliculitis also itches, but it still hurts, very painful. Even the muscles and nerves on the face hurt! Usually the back of the head is long! Many blisters form a ball! Treatment is the best. Inject chloramphenicol! External use does not require appropriate oral anti-inflammatory drugs. So you don't need a haircut! One injection a day, 1 day, the symptoms are relieved. The symptoms disappeared within 2 days. After 3 days, the blister contracted. Basically recovered after one week (specific medication depends on the condition)!
Humble opinion: I hope you are useful. I wish you a speedy recovery! Give you health!