I'm sorry to hear you're experiencing repeated vomiting and a sensation of acidity on your teeth. Vomiting multiple times after waking up can irritate your teeth and mouth due to stomach acid, which may cause that acidic feeling.

• This could be due to several causes such as gastritis, acid reflux, or an infection.
• It's important to stay hydrated by sipping small amounts of water.
• Avoid eating heavy or acidic foods until vomiting subsides.
• If vomiting continues beyond 24 hours, or if you develop severe abdominal pain, blood in vomit, or signs of dehydration (dizziness, dry mouth), seek urgent medical care.
• A doctor, such as a gastroenterologist, can evaluate your symptoms, possibly recommend tests, and provide appropriate treatment.

Please consult a gastroenterologist promptly to determine the cause and receive proper care. If symptoms worsen or you feel very unwell, consider emergency services.To narrow down potential causes, we will need some more information.I understand that you have vomited 3-4 times after waking up and your teeth feel acidic. Could you please tell me your age and gender?