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You can use a number of methods to relieve nausea and vomiting, including home remedies and medications.

Self-treatment for nausea
To treat nausea at home:

Consume only light, plain foods, such as bread and crackers.
Avoid any foods that have strong flavors, are very sweet, or are greasy or fried.
Drink cold liquids.
Avoid any activity after eating.
Drink a cup of ginger tea.

Self-treatment for vomiting

Eat smaller, more frequent meals.
Drink a large amount of clear fluids to remain hydrated, but consume it in small sips at a time.
Avoid solid foods of any kind until vomiting stops.
Rest.
Avoid using medications that may upset your stomach, such as nonsteroidal anti-inflammatory drugs or corticosteroids.
Use an oral rehydration solution to replace lost electrolytes.

Referance link:
https://www.healthline.com/health/nausea-and-vomiting#treatment