A fungal infection in the groin that keeps coming back is quite common, especially in warm and sweaty areas, and it often recurs if the treatment is incomplete or if certain creams (especially those containing steroids) are used. Steroid creams may reduce redness and itching for a short time, but allow the fungus to grow back stronger, which could be why your infection keeps returning. The best way to manage this is to use a proper antifungal treatment for a sufficient duration, often for a few weeks and sometimes even continued for a short period after the skin looks normal to prevent relapse. At the same time, keep the area clean and completely dry, wear loose cotton underwear, change clothes regularly, and avoid tight or synthetic fabrics that trap moisture. Do not share towels or personal items, and wash clothes in hot water if possible. It is also important to avoid self-medicating with combination creams. If the infection still persists, a doctor may check for underlying factors like diabetes, low immunity, or reinfection from other body areas and may prescribe a longer or stronger course of treatment. With consistent care and the right approach, this condition can be effectively controlled and cured.

If tinea cruris is not improving after treatment, it may be resistant, recurrent, or not fully cleared. Keep the area dry, wear loose cotton clothing, and avoid steroid creams. Do not continue or change antifungal tablets on your own. Consult a dermatologist for re-evaluation and appropriate treatment adjustment.

Managing a persistent fungal infection requires addressing your diabetes, as high blood sugar promotes fungal growth. Since you have high blood pressure and diabetes, some oral antifungal medications (like fluconazole) can interact with your current prescriptions. For a safe treatment, topical antifungals (such as clotrimazole or terbinafine) are safest because they avoid these drug interactions. Please focus on controlling your blood sugar levels, as this is key to clearing the infection. Consult your doctor to safely coordinate any oral treatment.

The black spot after ringworm is usually post-inflammatory pigmentation, which means the skin has darkened after healing from infection and irritation, especially if strong products like hydrogen peroxide were used. This is not an active infection, and it generally fades slowly over weeks to months, but some topical care can help speed up the process. Gentle options like niacinamide cream or azelaic acid can help gradually lighten dark patches and improve skin tone without being too harsh. Vitamin C-based creams may also support fading of pigmentation over time. It is important to apply sunscreen daily on exposed areas, because sunlight can make the marks darker and longer-lasting. Avoid using bleaching creams, strong steroids, or repeated hydrogen peroxide, as they can irritate the skin further and worsen pigmentation. Keeping the area moisturised and avoiding scratching or friction also helps healing. If the dark spot is not improving even after a few months or is getting thicker, it is better to consult a dermatologist for stronger prescription options and to rule out any ongoing skin irritation.

Since your infection persists after using fluconazole, the fungus may be resistant, or the diagnosis needs re-evaluation. First, a doctor should perform a skin scraping or culture to identify the exact organism. If it is a resistant fungal infection, alternative oral medications like terbinafine or itraconazole may be prescribed for a longer duration. It is also important to rule out non-fungal conditions, such as eczema, or underlying factors like diabetes that hinder healing. Please consult your dermatologist for a tailored treatment plan.