What’s wrong with a slight tremor of the lips is mainly seen in the following areas: First, in patients with previous Parkinson’s, in addition to tremor of the limbs, slow movement and stiffness, most patients will also have a tremor of the lips or tongue tremor, which can be relieved after anti-Parkinsonian medication is given. Second, patients who are in a state of great emotional stress or anxiety may experience a slight tremor of the lips during anxiety attacks or a trembling voice when speaking. Third, the slight trembling of the lips, but also to ask the patient whether there is any previous family history, especially for young and middle-aged patients appearing to have a slight trembling of the legs, and then to consider the patient may have idiopathic tremor. Fourth, a slight tremor of the lips, to consider whether the patient has sleep-related factors, some patients who have sleep disorders may also have a slight tremor of the lips when they are mentally stressed.