White patches on the inner thighs can indicate a variety of skin conditions, including but not limited to fungal infections, uneven pigmentation, or skin inflammation. This condition may be accompanied by mild itching, especially noticeable in warm, moist environments.

If the patches have well-defined, ring-shaped edges, it may be due to a fungal infection, which is more likely to occur in warm, moist environments. Another possibility is uneven pigmentation, which is usually not accompanied by pain or itching, but may become more noticeable after the skin is rubbed or irritated.

If symptoms continue to spread, are accompanied by severe pain or signs of infection (such as redness, swelling, and oozing), more serious skin conditions such as psoriasis or skin cancer should be considered, and medical attention should be sought promptly for professional diagnosis and treatment.
Patients must understand that self-diagnosis has limitations, especially regarding skin conditions; similar-looking symptoms can have drastically different causes. If symptoms persist or are accompanied by discomfort, seek professional medical help for a proper diagnosis as soon as possible.
[Prevention Tips:]
1. Keep your skin clean and dry, and avoid prolonged exposure to humid environments.
2. Wear breathable clothing to reduce skin friction.
3. Pay attention to personal hygiene and change clothes and bedding regularly.
4. Avoid using cosmetics or skincare products that may cause allergies or skin irritation.