Carbuncles and infections are quite common in the private parts. Since the party is not exposed to air and its little difficult to maintain hygiene, infections tend to recurr.
Antibiotics help only temporarily.
Consider taking Homeopathy treatment as there are excellent medicines for such problems in Homeopathy.
Next Steps
After a course of Homeopathic treatment, infections will not recurr.
it's better you personally visit the doctor so that he can see whether it's carbuncle or something else.
Health Tips
Always keep the area.