Groin Fungal Infections and Inner Thigh Rashes

Fungal infection and rash on the inner thighs?

Originally, I went to see a dermatologist because of tinea cruris.
Although it had been years (it used to itch, but then it stopped), the area of the tinea cruris was getting larger, so I sought medical attention.
After applying a topical ointment (Afu Jian), there was a noticeable reduction in the tinea cruris, and the edges were no longer red.
However, the rash on the inner thigh became more pronounced and extended towards the knee.
It was originally on the right side, but now it has also appeared on the left side, although it is not itchy at all.
The red spots vary in size; could this be eczema?

Brown, 40~49 year old female. Ask Date: 2022/07/24

Dr. Wu Yuxin reply Dermatology

Without actually seeing the lesion, it is impossible to determine the issue.
If it is causing significant distress, please seek medical attention promptly.
Only after an examination can the problem be identified and addressed.

Reply Date: 2022/07/24

More Info

Understanding groin fungal infections, commonly known as tinea cruris or "jock itch," is essential for effective management and treatment. This condition is caused by dermatophyte fungi, which thrive in warm, moist environments, making the groin area particularly susceptible. Symptoms typically include a red, itchy rash that may have a raised, scaly border. However, in some cases, the itchiness may subside over time, as you have experienced.

In your situation, it seems that the topical treatment you received has effectively reduced the fungal infection in the groin area, as evidenced by the diminished redness and size of the rash. However, the development of a rash on the inner thighs that is spreading and becoming more pronounced, despite being non-itchy, raises some considerations.

The appearance of red spots or rashes in the inner thigh area could indeed be due to several factors. While it is possible that this could be a continuation of the fungal infection, it may also represent a different dermatological condition. Conditions such as eczema (or dermatitis), psoriasis, or even contact dermatitis could present with similar symptoms. Eczema, for instance, can manifest as red, inflamed patches that may not always itch, especially in chronic cases.
It's also important to consider that fungal infections can sometimes lead to secondary skin irritations or even bacterial infections, particularly if there has been any scratching or friction in the area. The fact that the rash is spreading to the left side and moving towards the knee could indicate a need for further evaluation.

Given that the rash is not itchy, it might not be a classic presentation of eczema, but it is still essential to monitor its progression. If the rash continues to spread or changes in appearance, a follow-up with a dermatologist is advisable. They may perform a skin scraping or culture to determine if the rash is fungal or if another condition is present.
In terms of treatment, if the rash is indeed fungal, antifungal creams or powders may be recommended. If it is determined to be eczema or another non-fungal condition, topical corticosteroids or other anti-inflammatory treatments may be necessary.

In summary, while your groin fungal infection appears to be improving, the new rash on your inner thighs warrants further investigation. It is crucial to maintain open communication with your healthcare provider and report any changes in your symptoms. Proper diagnosis and treatment are key to managing skin conditions effectively, ensuring that you can return to comfort and health.

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