Itchy Red Bumps on Back, Buttocks, and Groin: Possible Skin Conditions Explained - Dermatology

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You have a large area of papular lesions on your back, lower back, buttocks, and groin that are extremely itchy and dark red in color.
Creams have been ineffective.
What condition might this be? Thank you!

seiko, 30~39 year old female. Ask Date: 2000/11/16

Dr. Zheng Lizhen reply Dermatology


I'm not sure what ointment Seiko applied, but if it's not the right treatment, of course, the effect will be poor! The area you described is a common site for tinea cruris, but it could also be eczema or other conditions.
The treatments for tinea cruris and eczema are different, so please consult a dermatologist for an accurate diagnosis before starting treatment, to avoid wasting time and money!

Reply Date: 2000/11/16

More Info


The presence of itchy red bumps on the back, buttocks, and groin can be indicative of several skin conditions, and it is essential to consider various factors to arrive at a potential diagnosis. Based on your description, the symptoms you are experiencing could be related to conditions such as contact dermatitis, folliculitis, or even a fungal infection like tinea (ringworm).
1. Contact Dermatitis: This condition occurs when the skin comes into contact with an irritant or allergen. Common triggers include soaps, detergents, or even certain fabrics. The resulting rash can be itchy and red, and it may appear as bumps or blisters. If you have recently changed any products you use on your skin or laundry, this could be a possible cause.

2. Folliculitis: This is an inflammation of the hair follicles, often caused by bacterial or fungal infections. It can present as red, itchy bumps that may resemble acne. Folliculitis can occur in areas where there is friction, such as the buttocks and groin, especially if you wear tight clothing or engage in activities that cause sweating.

3. Fungal Infections: Conditions like tinea corporis (ringworm) can cause red, itchy patches that may have a raised border. These infections thrive in warm, moist areas of the body, such as the groin and buttocks. If the bumps are scaling or have a distinct ring-like appearance, this could be a strong indicator of a fungal infection.

4. Eczema or Atopic Dermatitis: If you have a history of eczema, this could also explain the itchy red bumps. Eczema can flare up due to various triggers, including stress, temperature changes, and irritants.

5. Psoriasis: This chronic skin condition can cause red, scaly patches that may itch. It often appears on the elbows, knees, and scalp but can also affect other areas, including the back and buttocks.

Given that topical treatments have not provided relief, it is crucial to consult a healthcare professional or dermatologist for an accurate diagnosis. They may perform a physical examination and, if necessary, conduct tests such as a skin scraping or patch testing to identify the underlying cause of your symptoms.

In the meantime, here are some general recommendations to help alleviate your symptoms:
- Avoid Scratching: While it may be tempting, scratching can worsen the irritation and lead to secondary infections.

- Keep the Area Clean and Dry: Ensure that the affected areas are clean and dry, as moisture can exacerbate fungal infections and irritations.

- Use Mild Soaps: Opt for gentle, fragrance-free soaps and avoid harsh chemicals that can irritate the skin.

- Wear Loose Clothing: Tight clothing can cause friction and worsen the condition. Loose-fitting garments made of breathable fabrics can help.

- Over-the-Counter Treatments: Depending on the suspected cause, over-the-counter hydrocortisone cream may help reduce inflammation and itching. Antifungal creams are also available if a fungal infection is suspected.

In conclusion, while there are several potential causes for the itchy red bumps you are experiencing, a definitive diagnosis can only be made by a healthcare professional. It is advisable to seek medical attention to receive appropriate treatment and relief from your symptoms.

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