Pimples inside the hair with painful pressure are considered to be folliculitis in the scalp area, which is mainly caused by large secretion of sebaceous glands inside the hair follicle blocking the mouth of the follicle, thus triggering a large number of anaerobic bacteria to grow inside the follicle after isolated distribution, which can be densely arranged. In severe cases, the inflamed pimples will gradually form cyst-like changes, and pressure on the cyst site can lead to scalp fluctuations, and in severe cases, it can lead to hair loss at the top of the follicle. The bacteria will stimulate the surrounding skin cells to become painful during the metabolism process, and the pain will be significantly increased by pressure, because the inflammation of the inflamed epidermis is aggravated by external compression. If you want to treat, it is recommended to take oral minocycline or metronidazole when the symptoms are not too severe.