What could be the reason for a lump that has developed at the top of the inner thigh?

Generally, lumps appearing in the upper thigh area may be caused by friction irritation, inadequate local hygiene, folliculitis, lymphadenitis, or epidermal cysts. If discomfort occurs, it is recommended to seek timely medical evaluation and treatment at a reputable hospital. Specific causes are analyzed as follows:

1. Friction Irritation

Tight clothing or frequent physical activity can cause repeated friction on the skin of the upper thigh, leading to localized tissue hyperplasia and lump formation. Wearing loose, breathable clothing, reducing strenuous exercise, and avoiding friction on the affected area can help. Applying moisturizer appropriately may also keep the skin hydrated.

2. Inadequate Local Hygiene

The upper thigh area tends to accumulate dirt and sweat, and buildup of sweat and secretions may clog pores, causing localized bumps. Wash the area daily with warm water, keep the skin dry, change cotton underwear frequently, and avoid prolonged retention of sweat.

3. Folliculitis

Inflammation caused by bacterial infection of hair follicles, presenting as red bumps accompanied by mild pain. Topical medications such as mupirocin ointment, fusidic acid cream, or clindamycin gel may be used as directed by a physician. Keep the area clean and avoid squeezing.

4. Lymphadenitis

Infection from nearby areas spreads to lymph nodes, causing them to swell and form palpable lumps, often accompanied by tenderness. Antibiotics such as amoxicillin capsules, cefradine tablets, or roxithromycin dispersible tablets may be taken under medical guidance, along with treatment of the primary infection source.

5. Epidermal Cyst

Blocked sebaceous gland ducts lead to accumulation of sebum and cyst formation. These cysts are usually firm and typically not painful. If infection occurs, topical ichthammol ointment may be used first. After controlling the infection, surgical excision of the epidermal cyst can be performed. Postoperative wound care should include keeping the area dry.

In daily life, it is important to wear loose-fitting clothing to reduce friction; maintain good local hygiene to prevent dirt buildup; wash and dry thoroughly after exercise; and seek medical attention promptly if signs of infection appear—avoid self-treatment that could worsen the condition.