Hairs don't ingrow unless they are yanked out by the roots. When I hear people speak of infected hair follicles that are mucus-coated that are stuck under the skin, I feel I am dealing with someone who is likely pulling the hairs out. This results in an inflame red bump, which you indeed describe. Here's a suggestion: for a period of 45 days, leave all these hairs absolutely and strictly alone. I assure you that no harm will come to you for having done so. Then, if there is anything left to show a dermatologist, please do so. But no squeezing or plucking, or else the doctor will not be able to tell what you have. I'm not sure where these hairs are, but if they're in the groin or on the neck, for instance, long-term hair reduction using a laser may be worth considering.
Best.
Dr. Rockoff