The common causes of vomiting include:
Indigestion
Food poisoning
Gastritis
Stomach ulcer
Gallstones
Morning sickness
Migraine
Motion sickness
Overeating
Heart attack
Brain tumour
Viral gastroenteritis
Overconsumption of alcohol
Obstruction in the intestine
Milk allergy
Coughing
Appendicitis
Pneumonia
Meningitis
Irritable bowel disease

Brain-related diseases such as brain tumour, haematomas, bruising of the brain tissue, cerebral oedema (swelling inside the skull), concussions, or stroke can cause vomiting.

Advanced stages of cancer can cause vomiting. These can be caused as a result of cancer growth, location of cancer, or due to treatment with chemotherapy or radiation therapy. A prolonged bout of vomiting can lead to malnutrition, electrolyte imbalance, and dehydration.

Some of the home care methods that can be taken to manage vomiting are:
Taking deep breaths
Drinking plenty of fluids to prevent dehydration
Having ginger, fennel, or cloves
Aromatherapy
Eating crackers to treat morning sickness
Avoiding strong smells
Eating bland food

Steps that can be followed to prevent vomiting are:
Take rest by sitting down or lying in a propped position
Drink small amounts of clear and sweet beverages like soda, ginger ale, or fruit juices, except acidic juices, such as grapefruit juice or orange juice
Have a popsicle
Avoid children playing and eating at the same time
Let children sit in a car facing the front windshield