What could it be if there is a raised, flat, round, non-itchy area on the skin?

Nov 28, 2025 Source: Cainiu Health

Dr. Liu Wenmin

Introduction

In general, raised, flat, round, and non-itchy skin lesions may be caused by sebaceous gland accumulation, friction-induced keratosis, flat warts, seborrheic keratosis, or dermatofibroma. If symptoms persist or the lesion enlarges, it is recommended to seek timely medical evaluation at a reputable hospital. In daily life, maintain clean and well-ventilated skin, and avoid prolonged skin friction and sun exposure.

Generally, the appearance of raised, flat, round, and non-itchy skin lesions may be caused by sebaceous gland accumulation, friction-induced keratosis, flat warts, seborrheic keratosis, or dermatofibroma. If symptoms persist or enlarge, it is recommended to seek timely medical evaluation at a正规 hospital. Specific causes are analyzed as follows:

1. Sebaceous gland accumulation: Overactive sebaceous glands with poor discharge lead to local buildup and raised areas. Use gentle facial cleansers, avoid frequent squeezing, maintain a light diet low in oily foods, and follow a regular sleep schedule.

2. Friction-induced keratosis: Prolonged local skin friction causes thickening of the stratum corneum, forming flat, raised lesions. Reduce local friction, wear loose clothing, and apply moisturizing lotion after cleansing with lukewarm water to soften the keratinized layer.

3. Flat warts: Caused by human papillomavirus (HPV) infection, which stimulates abnormal proliferation of skin cells. Follow medical advice to use topical recombinant human interferon α2b gel or imiquimod cream, take transfer factor oral solution, and avoid scratching to prevent spreading.

4. Seborrheic keratosis: Abnormal proliferation of keratinocytes due to skin aging, resulting in flat, raised lesions that are brown or black. Under medical guidance, apply topical tretinoin cream or fluorouracil ointment, or undergo liquid nitrogen cryotherapy. Practice sun protection to minimize ultraviolet exposure.

5. Dermatofibroma: A benign nodule formed by fibroblast proliferation in the skin, usually firm in texture. Generally no treatment is required; if cosmetically bothersome, excision may be performed under medical advice. Keep the surgical site clean and dry postoperatively to prevent infection.

In daily life, maintain clean and breathable skin; avoid prolonged skin friction and excessive sun exposure; maintain a regular lifestyle to enhance skin resistance; promptly consult a doctor for any skin abnormalities, and avoid self-medication or improper handling.

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