Tumor of submandibular gland can be asymptomatic in the early stage, or there can be symptoms such as lumps and pain; and there will also be complications such as crooked corners of the mouth and other symptoms. 1. Symptoms (1) Benign lesions: there may be no obvious symptoms in the early stage, only painless slow-growing lumps found by chance, such as bathing; there may also be localized painful lumps in the lower jaw, which may cause tilting of the tongue and other manifestations. (2) Malignant lesions: more rapid growth, localized pain and numbness and other manifestations. 2. Complicated symptoms: due to the tumor tissue invasion and stimulation of peripheral nerves, it will lead to symptoms such as skewed angle of the mouth and numbness of the tongue. If you suspect submandibular gland tumor or have the above symptoms, it is recommended to go to the hospital in time.