The reasons for the patient’s upper lip pain are as follows: First, ulcers: If the inner lip mucosa of the upper lip is painful, the biggest possibility is that it suffers from ulcers of the lip mucosa, the lip mucosa is a good part of the mouth ulcers, the main reasons for mouth ulcers are as follows: 1, immune deficiency: for example, in the person who has a cold and a fever, or during the menstrual period of a woman, it is very easy to induce mouth ulcers. 2, vitamins and Trace element deficiency: common in picky eaters and partiality of the crowd, especially when the body lacks B vitamins, or trace elements, such as calcium, iron, zinc, selenium, it is easy to get mouth ulcers. 3, immune function disorders: for irregular work and rest or long-term black and white reversal of the crowd, due to immune dysfunction, can also induce mouth ulcers. 4, dietary factors: when eating spicy and stimulating food or texture of hard food, it is also easy to trigger oral ulcers. 5, the dietary factors: when eating spicy and stimulating food, or hard food. When eating spicy and stimulating food or hard food, it will also cause oral mucosal ulcers. Second, chronic lipitis: upper lip pain if it is the lips external lip red skin pain, the biggest possibility is suffering from chronic lipitis. Chronic lipitis due to ultraviolet sun exposure is more powerful, or the external environment of windy, dry, coupled with the lack of vitamins in the body, it is easy to induce chronic lipitis, resulting in partial dryness of the lips, flaking, and even redness, swelling, vesiculation, pain.