Vomiting is caused due to food poisoning, ulcer and gastritis.Nausea is caused due to uneasiness of stomach, it comes before vomiting. Below given first aid tips should be performed to stabilize the person.
First Aid:
For Vomiting
Have the person drink small amounts of water, or clear liquids.
Don't give the person solid food until vomiting has stopped.
When the person can tolerate food, try small amounts of bananas, rice, and toast.
For Nausea
Have the person drink small amounts of water, or clear liquids.
If the person can keep it down, give the person light, bland foods like bread.
Seek medical help, if:
Pain in the middle or lower right side of the abdomen