Small bumps inside the lower lip pain is considered to be the emergence of mucus cysts, oral herpes and other diseases, can be general treatment or drug treatment. 1. Mucous cysts, if more secretions in the oral cavity, secretions gathered and not discharged in a timely manner, may lead to mucous cysts, cysts may appear after the increase in pain symptoms, generally can be surgical treatment, excision of mucous cysts. 2. Oral herpes, clinical oral herpes due to herpes virus invasion may lead to tissue fluid exudation, this symptom, you can use antiviral drugs under the guidance of the doctor, such as acyclovir, vasiclovir and so on. You need to pay more attention to oral hygiene, brush your teeth and rinse your mouth, and eat less spicy food.