The back of the head hair inside the pimple, this situation is considered folliculitis more likely, mainly caused by Staphylococcus aureus or Staphylococcus epidermidis infection later. The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things. If the disease is more serious, you can add oral drugs and other systemic treatment, such as oral minocycline, cephalosporin antibiotics for treatment. So after suffering from the disease, you should go to a regular hospital for a clear diagnosis and give appropriate treatment to avoid delaying the disease.