Thanks for posting your query. I can understand your concern.
Ingrown hair is usually caused when the hair is shaved off at an angle so that it curls back and goes into the skin and grows sideways resulting in a bump.
Folliculitis is caused when this ingrown hair becomes infected with bacteria. (folliculitis can be caused even without ingrown hair)
The treatment with doxycycline and benzoyl peroxide will treat the folliculitis but not the ingrown hair, however it won't act as a prevention for either.
Ideally the treatment for ingrown hair is to use a laser for hair removal, this removes all the ingrown hair.
The prevention for ingrown hair would be to shave with proper techniques:- not shave too close , shave only in the direction of hair growth.
Folliculitis can be prevented by maintaining good levels of hygiene.
Hope this helps, please feel free to discuss further.
Patient replied :
What are some less expensive ways to treat ingrown hairs?
Ingrown hair mainly requires laser, which is effective.
Application of retinoid creams is another option, but it is not very effective and can be a strong irritant in the pubic or genital area. Hence its better avoided in that area. It can be applied in the chest area though.
Hence I recommend that you shave with proper techniques to prevent them.