You can find easily an over the counter over-the counter antihistamines (e.g., loratadine,
desloratadine, cetirizine, fexofenadine) which can be used to help with symptoms. You may also use over the counter smoothening, antipruritic agents to get relief. Also use mild soaps and calamine lotion which helps in soothing the skin.
If the symptoms persist then you may need topical steroids.