Since your symptoms have lasted 4 to 5 months and OTC remedies failed, you likely have a resistant fungal infection, potentially worsened by steroid-containing creams. You need prescription-strength treatment: 1. Oral medication: Tab Itraconazole (100 mg twice daily) for 2-4 weeks. 2. Antifungal cream: Luliconazole (1%) cream applied once daily for 2-3 weeks. The skin darkening is post-inflammatory and will fade once the infection clears. Keep the area clean and dry, and wear loose cotton clothing. Please consult a doctor in person to get a formal prescription, as oral antifungals require professional monitoring.