The scalp bumps are usually caused by two conditions: 1, scalp folliculitis, usually the scalp hair follicles are blocked, resulting in bacteria in the hair follicles inside the multiplication of infection formed, usually the bumps may be local formation of pus points, squeeze will have pus oozing, and around there will be redness, swelling, pressure pain, you can use anti-inflammatory cream or oral antibiotic treatment. 2, there may be a Soft tissue infection of the skin of the scalp. The most common is an allergy to shampoo, gel, gel cream or to hair dye. Usually there will be very obvious itching symptoms of the scalp, and there will not be pus spots. You can take oral anti-allergy medications such as loratadine and cetirizine, and stop applying topical chemicals and change shampoos to improve the symptoms.