Bug bites on the lips can appear red, swollen, can be accompanied by obvious itching symptoms, because the bug’s body fluids injected into the skin caused by an allergic allergic reaction. Treatment can be topical hormonal creams, such as Denadyl cream, hydrocortisone butyrate cream or fluticasone propionate cream, and oral antihistamines, such as levocetirizine hydrochloride tablets, loratadine tablets, or ibastine tablets, if necessary. Specific diagnosis and treatment is recommended in the clinician after the diagnosis is clear and then give reasonable treatment, to avoid delaying the condition.