This is Dr. David
this could be due to ingrown hair follicles or blocked skin pores causing subaceous or epidermal cyst on the top of his head
they could be infected if they hurt when touched.
he should see a skin doctor or his primary care doctor
they might need to be squeezed to release pressure.
or he might need a course of antibiotics to treat an infection.
let me know if you have other questions.
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