Insect bite dermatitis, medically also known as papular urticaria, generally presents with mild symptoms. It appears as a red welt with possible small blisters in the center. This type of dermatitis typically improves with the application of calamine lotion. For severe redness and pain, antiallergic medication such as loratadine can be taken, and topical corticosteroids may be applied. More severe symptoms may include blisters, erosion, and rupture. In such cases, it is advisable to seek treatment at a dermatology department of a formal hospital where the affected area can be cleaned with iodine and treated with infrared therapy, supplemented appropriately with oral traditional Chinese medicine that clears heat and detoxifies, such as Potentilla chinensis anti-inflammatory oral solution.