There are many reasons for the sudden swelling of the lower lip, such as insect bite dermatitis, angioedema, lipitis and other causes.
1. Insect bite dermatitis: mosquito bites and toxin stimulation may cause localized insect bite dermatitis, resulting in sudden swelling of the lower lip.
2. Angioedema: it is a limited edema that occurs in the subcutaneous loose tissues or mucous membranes, which is related to allergic reactions caused by factors such as contacting or taking allergenic substances, and can also lead to sudden swelling of the lower lip.
3. Lipitis: Inflammatory reactions caused by external bacterial, viral and fungal infections of the lip tissue can also lead to sudden swelling of the lower lip.
Lower lip suddenly swollen, there may be other reasons, need to go to the hospital in time to check the cause.