What causes many bumps on the leg, and what should be done?

Many bumps have appeared on the leg, possibly due to insect bites, skin friction, urticaria, eczema, folliculitis, or other causes. These can be improved through mosquito protection, reducing friction, and medication. If the bumps continue to increase in number, itching worsens, or are accompanied by fever, prompt medical attention is necessary.

1. Insect bites: During summer or in outdoor environments, insect bites on the legs release toxins that cause localized redness, swelling, and itchy bumps. It is recommended to wear long pants when going outdoors, apply insect repellent, avoid scratching, and use a cold compress with a cool towel to relieve itching.

2. Skin friction: Long-term wearing of tight clothing or frequent physical activity can lead to repeated friction on the leg skin, causing local tissue congestion and edema, resulting in red raised bumps, possibly accompanied by mild burning sensation. It is advised to switch to loose, breathable clothing, reduce intense leg movements, and avoid friction irritation.

3. Urticaria (hives): Triggered by allergies, infections, or other factors causing dilation of blood vessels in the skin and mucous membranes, leading to raised, patchy welts of varying sizes on the legs, accompanied by severe itching. These welts may disappear quickly without leaving marks. It is recommended to use medications such as loratadine tablets, cetirizine hydrochloride drops, or calamine lotion under medical guidance to relieve symptoms.

4. Eczema: Skin inflammation caused by genetic factors, damp environments, or other triggers results in red patches and丘疹-like bumps on the legs, accompanied by itching and flaking; in severe cases, there may be oozing. Patients may use medications such as desonide cream, hydrocortisone butyrate cream, or zinc oxide ointment under a doctor's supervision to improve symptoms.

5. Folliculitis: Bacterial infection of hair follicles leads to inflammation, causing red papules or pustules centered around hair follicles on the legs, accompanied by mild pain or itching. Patients may follow medical advice to use mupirocin ointment, erythromycin ointment, or cefaclor dispersible tablets to alleviate symptoms.

Maintain clean and dry leg skin, choose mild, non-irritating bathing products, avoid scratching the bumps to prevent infection, eat a light diet avoiding spicy and irritating foods, and wear loose, breathable cotton clothing to support skin recovery.