hello You may take over the counteer anti-allergic meicne llike levocetrizine cotaining compound or loratidine compound.Wash the area of bite thorughly with soap and water and apply anti-inflammatory gel, preferably containing betamethasone (betnovate).Depending on the location area, mosqito bite diseases can be many in endemic areas prone to-malaria,dengue and other diseases infection-visit to Govt. health clinic in your area will identify on basis of endemicity of infection and preventive measures/treatment advised accordingly.Use mosquito repellent creams and mosquito nets, cover your exposed hands and feet, face, neck etc when you visit such areas best wishes