A fungus called Malassezia, which resembles yeast, can accumulate on your scalp after a prolonged period of not washing your hair.
You may have folliculitis, a common skin condition that occurs when sweat or hair products clog or irritate the hair follicles on your scalp.
To begin with, let us clarify that oil, or sebum, is not the enemy of your hair. In actuality, sebum is necessary in moderation to protect your hair, give it structure, and maintain the pH balance of your scalp.
Sensitive regions such as the neck, eyebrows, and behind the belt are more likely to experience ingrown hairs.
Odors from your workout, the pizza place, or the pillowcase you haven't washed in weeks are all drawn to too oily hair.
Although losing hair isn't inherently "nasty," it might be troublesome if you like your hair.