Hello and welcome!
The common causes of nausea are gastritis, peptic ulcer disease, gastroesophageal reflux disease. Eating disorders will have self induced vomiting.Oxycarbamezapine causes nausea as one of its side effect.Labyrinthitis, migraine cause nausea but there may be other associated symptoms. In hepatitis there will be loss of appetite, yellowish discoloration of eyes and skin along with nausea. Rare but serious causes of nausea are brain tumors, meningitis .It is best to see a local doctor and get a clinical examination done. A complete clinical evaluation will help in detecting the cause of your illness. Treatment will depend on the cause. I hope it helps.
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