Itchy lips and blisters indicate herpes simplex virus infection. Herpes simplex infection is mainly common in people with disordered and low immune function of the body. When herpes infection occurs, antiviral treatment should be carried out. You can take oral antiviral medications, such as antiviral oral solution, Banlangen granules, Ganciclovir, Famciclovir, etc. You can also apply topical acyclovir ointment to the blistered lips for local antiviral treatment. If the blisters break down leaving a ruptured surface with bleeding, redness, swelling and erosion, or even a yellowish-white pseudomembrane on top, this suggests a secondary bacterial infection, and then erythromycin ointment can be applied locally for anti-inflammatory purposes. In addition, patients suffering from herpes labialis should ensure adequate rest and sleep on a daily basis. Go to bed early, get up early and do the right amount of exercise to strengthen the immune function of the body. At the same time, you should avoid spicy and stimulating food in your diet, eat more light and easy-to-digest food, ensure a balanced nutrition, and ensure sufficient vitamin income and intake of trace elements.