Recurrent fungal infection on the thighs can happen if the area stays moist or if treatment is not continued long enough. Keep the area clean and completely dry, wear loose cotton clothing and avoid sweating as much as possible. Do not stop treatment early, even if symptoms improve, as this can lead to recurrence. Avoid sharing towels or tight clothing that can spread infection. Consult your doctor for proper evaluation and a longer or adjusted treatment plan if it keeps coming back.