Skin infections may be bacterial/fungal/viral. It is important to consult a dermatologist for specific treatment and avoid malpractice by unqualified/underqualified who tend to give steroid combinations for temporary relief followed by aggravation. Common infections are folliculitis, tinea cruris/corporis, verrucae vulgaris (warts) that tend to be ignored in milder stages and are only shown to a specialist as a challenge after aggravation by local treatments or complications.
It is important to have specific tests done initially for quick and accurate treatment by dermatologist along with proper counselling regarding causes and avoidance of reccurrences.