What causes a lump at the junction of the thigh and lower abdomen, and what should be done about it?
Dec 01, 2025
Source: Cainiu Health
Dr. Li Feng
Introduction
In general, lumps occurring at the junction of the thigh and lower abdomen may be caused by factors such as sebaceous gland blockage, local friction or irritation, folliculitis, lymphadenitis, or epidermoid cysts. Depending on the specific situation, treatments may include general management, medication, or surgical intervention to improve the condition. Daily skin hygiene should be maintained, comfortable clothing should be worn to minimize irritation, and a light, low-fat diet is recommended to reduce sebum production.
Generally, lumps appearing at the junction of the thigh and lower abdomen may be caused by sebaceous gland blockage, local friction or irritation, folliculitis, lymphadenitis, or epidermoid cysts. Depending on the specific situation, improvements can be achieved through general management, medication, or surgical treatment. A detailed analysis is as follows:
1. Sebaceous Gland Blockage
This area contains abundant sebaceous glands, and excessive sebum production can easily clog ducts, forming small subcutaneous lumps. Maintain cleanliness and dryness of the area, wear loose and breathable clothing, avoid frequent squeezing, and follow a light diet to reduce sebum secretion.
2. Local Friction Irritation
Tight clothing or repeated friction can cause skin tissue hyperplasia, leading to lump formation, often accompanied by mild redness. Switch to loose cotton clothing to reduce local friction, clean the area with warm water, and apply a gentle moisturizer afterward.
3. Folliculitis
Bacterial infection of hair follicles causes inflammation, resulting in red, swollen lumps that may be slightly painful. Maintain local hygiene and, as directed by a physician, apply topical antibiotics such as mupirocin ointment or fusidic acid cream, and take oral cefuroxime axetil tablets.
4. Lymphadenitis
Infection from surrounding tissues spreads to lymph nodes, causing them to swell. The swollen nodes feel firm but mobile upon touch. Treat the primary infection promptly and, as prescribed, take amoxicillin capsules, roxithromycin dispersible tablets, or levofloxacin tablets.
5. Epidermoid Cyst
Skin trauma may implant epidermal cells into the subcutaneous layer, forming an encapsulated cyst with a clearly defined, firm texture. Avoid squeezing to prevent infection. If treatment is needed, surgical excision of the epidermoid cyst can be performed. Keep the surgical wound clean after the procedure.
In daily life, maintain good skin hygiene and wear comfortable clothing to minimize irritation. Follow a light, low-fat diet to reduce sebum production, and address any signs of infection promptly. Seek immediate medical attention if the lump continues to grow, becomes increasingly painful, or ruptures with pus discharge.
