Why is there a small bump on my lip?

There are various reasons you might see a small bump on your lip. One common cause is an oral mucocele. This happens when saliva gets trapped under the skin due to a clogged or injured salivary gland after a minor trauma like biting your lip. The bump is usually soft and filled with fluid. Another possibility is a cold sore (which is caused by a type of herpes virus). Herpes can start as a tiny bump that may later turn into a blister and then a sore, often with a tingling feeling at the start. In some cases, small bumps can appear as a result of acne. Although acne is more common on the face, it can sometimes affect the lip area. If you have been in contact with an irritant or allergen (like a new lip product), this could cause a bump through contact dermatitis. Most causes are mild and not serious, but if the bump changes, grows, or causes discomfort, it is a good idea to have a healthcare provider check it out. To better understand what might be causing your symptoms, you can check your symptoms for personalized insights. This explanation is educational and not exhaustive. It should not substitute for personalized medical advice.