There are many reasons for red bumps on legs, common causes are eczema, contact dermatitis, folliculitis, ringworm and other causes, medication can be given according to the cause. 1. Eczema: Inflammatory skin reactions caused by internal and external stimuli may lead to red bumps and itching on the legs, which can be treated with topical zinc oxide ointment, boric acid solution and other medications. If necessary, it can be combined with oral antihistamine drugs such as loratadine. 2. Contact dermatitis: contact with allergens or irritants cause red bumps on the legs, itching. First of all, to avoid re-exposure to the causative agent, can be used externally with glycerine lotion, hydrocortisone ointment, severe symptoms can take loratadine, cetirizine and other antihistamines. 3. Folliculitis: leg skin follicles secondary bacterial infection caused by the inflammatory reaction, can also lead to red bumps on the legs, can be used externally fusidic acid cream, mupirocin ointment and other antibiotic drugs. 4. Ringworm: caused by fungal infection of the skin of the lower limbs, often manifested as erythema, papules, flaking, itching and other symptoms. At this time need antifungal treatment, such as external miconazole cream, ketoconazole cream, oral itraconazole and other drugs if necessary. Red bumps on the legs, there may be other reasons, you need to go to the hospital to check the cause of the disease, symptomatic treatment. The above medications should be used in accordance with medical advice.