Patients with brain metastasis of squamous lung cancer usually have symptoms such as nausea, vomiting, headache, etc. Some patients may also have visual impairment, etc. Severe patients with brain metastasis of squamous lung cancer may also have symptoms of coma or general weakness. The specific symptoms of brain metastasis of squamous lung cancer are mainly related to the size and location of the metastases. 1. In the early stage of brain metastasis of squamous lung cancer, the metastatic foci are small and do not compress the important organs of the patient, so the patient has no obvious clinical symptoms. 2. With the development of disease, the metastases gradually become bigger, and patients with brain metastasis of squamous lung cancer usually have nausea, vomiting, headache and other symptoms. 3. When the metastatic foci compress the corresponding areas of the brain, corresponding dysfunction will also occur, such as compressing the occipital lobe, which will lead to visual impairment. For patients with severe brain metastasis of squamous lung cancer, coma or generalized weakness will usually occur. Patients should actively cooperate with doctors for treatment, which can help prolong the survival period and improve the quality of life.