Vomiting without signs in the elderly may be related to gastrointestinal dysfunction, increased intracranial pressure, mental factors and other reasons. 1. Gastrointestinal dysfunction: when the elderly have irregular diet, indigestion or drug stimulation, etc., it can induce gastrointestinal dysfunction and symptoms of vomiting, accompanied by abdominal pain, bloating, diarrhea and other conditions. 2. Increased intracranial pressure: When there are brain tumors, brain hemorrhage, hydrocephalus and other neurological diseases in the elderly, there can be increased intracranial pressure, leading to vomiting without signs, in addition to headache, optic papillae edema, and in severe cases, coma can occur. 3. mental factors: when the elderly in irritability, anxiety, depression and other mental state, can cause vomiting and a series of gastrointestinal symptoms. Vomiting in the elderly without signs can also be caused by many reasons, it is recommended that patients go to the hospital in a timely manner, to clarify the cause of the targeted treatment, so as not to cause adverse effects.