Feeling nauseous and unable to eat after having a stent for thoracic aortic aneurysm is usually related to factors such as mental tension, adverse reaction to medication and insufficient blood and oxygen supply. 1. Mental tension: before or after implantation of thoracic aortic stent, too much tension, anxiety or fear will affect normal eating, nausea, vomiting, loss of appetite and other symptoms, which can be relieved naturally after emotional relaxation. 2. Adverse drug reactions: after implantation of stent for thoracic aortic aneurysm, long-term anticoagulant and antiplatelet aggregation drugs need to be taken, and nausea, vomiting, loss of appetite and other symptoms may occur under the influence of drugs. Most of them can be relieved by themselves after stopping the drugs. 3. Insufficient blood and oxygen supply: some patients with thoracic aortic aneurysm may suffer from insufficient blood and oxygen supply in the chest after surgery, which may affect the appetite and lead to nausea and vomiting if not improved in time. After the operation, patients should pay attention to rest and reduce the amount of activities. After stent implantation for thoracic aortic aneurysm, patients should be observed more frequently and go to the hospital regularly for follow-up, and should consult the doctor promptly if there are any adverse reactions.