A pimple growing inside the upper lip is considered to be caused by mucous gland cysts, sebaceous gland cysts, oral herpes and other factors.
1. Mucous gland cysts: may be due to long-term lip biting and other bad habits, so that the mucous glands are stimulated and localized rupture, resulting in saliva infiltration into the mucous gland tissues of the upper lip, and blockage, siltation into cysts, thus causing a pimple inside the upper lip of the upper lip.
2. Sebaceous cysts: generally due to long-term dietary stimulation or spicy and other reasons, resulting in sebaceous gland secretion is too exuberant, fat accumulation, and make the upper lip tissue follicle sebaceous gland mouth blockage, the formation of cysts, and then appeared in the upper lip inside a pimple of the situation.
3. Oral herpes: usually due to a lack of attention to oral hygiene and other factors, so that the virus invades and infects the oral cavity, resulting in localized lesions on the oral epithelium and mucosa, and herpes, which in turn causes a pimple inside the upper lip.
The upper lip inside a pimple may also be related to oral polyps and other diseases, if there is a pimple on the upper lip inside a pimple, you should go to the hospital in time to check, under the judgment of the doctor for treatment.