There are several products and practices that sometimes bring problems with ingrown hair:
Products that clog pores (shaving blades with soap or deodorant or built-in conditioning strips).
Sweating without taking bath right away, like right after the gym, particularly after a shave.
Waxing, which causes irritation and sometimes creates inflammation when the hair returns.
Constant shaving (like on men’s faces).
Shaving or tweezing hairs (often on the face) that are dark and coarse.
Contrary to popular belief, you shouldn’t yank out any ingrown hairs.
If there’s pus, that means there is a slight infection.
So keep the area clean and dry and avoid shaving there until it clears up.
If, however, you have ingrown hair that recurs frequently, creates hyperpigmentation (particularly on the face), or feels like a deeper or worsening sore, consult with a skincare professional for treatment options.