There are many pimple-like bumps on the thigh.

Generally, the appearance of acne-like bumps on the thighs may be caused by factors such as clothing friction, hormonal changes, urticaria, eczema, or folliculitis. If abnormalities occur, it is recommended to seek medical attention promptly. Detailed analysis is as follows:

1. Clothing Friction

Frequent friction from clothing can irritate the skin, leading to abnormal keratinization of hair follicle openings, which easily clogs pores and causes papules. Certain materials, such as synthetic fibers, may irritate the skin and trigger localized inflammatory reactions. It is advisable to wear comfortable, breathable cotton clothing and avoid wearing tight pants for extended periods. Keep the skin dry and clean, and use mild cleansing products such as gentle facial cleansers or body washes to minimize skin irritation.

2. Hormonal Changes

Hormonal fluctuations during puberty can increase sebaceous gland activity. Excess oil mixed with dead skin cells may clog pores, forming whiteheads or blackheads, which may subsequently develop into inflammatory papules. Maintain good personal hygiene, regularly cleanse the skin, and avoid squeezing pimples.

3. Urticaria

Urticaria is a skin condition caused by allergic reactions, resulting in vascular edema that manifests as wheals of varying sizes accompanied by itching. Wheals may appear and disappear rapidly without leaving marks; in severe cases, systemic symptoms such as abdominal pain, diarrhea, or chest tightness may occur. Avoid known allergens, and under medical guidance, medications such as montelukast sodium tablets, compound glycyrrhizin tablets, or diphenhydramine hydrochloride tablets may be used to relieve symptoms and control the condition.

4. Eczema

Eczema is an inflammatory skin reaction triggered by various internal and external factors, characterized by erythema, papules, and vesicles, often accompanied by intense itching. Skin lesions are typically symmetrically distributed and tend to ooze; the condition is prone to recurrence. Follow medical advice to apply topical treatments such as eczema ointments or mild corticosteroid creams, including prednisone acetate cream, desonide cream, ketoconazole cream, or itraconazole capsules.

5. Folliculitis

Folliculitis occurs when hair follicles become infected with bacteria, causing inflammation and red papules, which may progress to pustules in severe cases. The area around the papules may appear swollen, red, and painful, sometimes accompanied by pus-filled blisters. Under medical supervision, topical or oral medications such as mupirocin ointment, fusidic acid sodium ointment, or cefuroxime axetil tablets may be used to alleviate discomfort.

It is recommended to maintain a balanced diet, consume more fresh fruits and vegetables, and ensure adequate intake of vitamins and trace elements. Practice good personal hygiene and wear comfortable, breathable clothing.