Why would vomiting start for no reason?

You have already taken the most important step, to see a specialist.

Here is some information which may be useful:

While you may be able to manage vomiting at home (making sure you’re staying hydrated!), if you’re experiencing vomiting for extended periods of time where you can’t keep anything down, you should go to the ER.

“Potential causes of vomiting vary widely with a long list of possible explanations,” says gastroenterologist Christine Lee, MD.

Dr. Lee explains the common reasons you can’t stop throwing up, how you can manage it at home and when you need to seek medical attention.

Common reasons for throwing up
There are many reasons you can’t stop vomiting. Dr. Lee says some of the most common reasons are:

Stomach flu (gastroenteritis).
Food poisoning.
Motion sickness.
Pregnancy.
Migraines.
Cancer treatments.
Fevers.
Bowel obstruction.

Some serious conditions such as a concussion, meningitis and appendicitis may also lead to vomiting.

What might be a sign to get medical attention
Some classic alarm features to look for when determining if an emergency room visit is necessary are if you’re unable to keep anything down, your symptoms escalate or you experience any of the following:

Bleeding.
Lightheadedness.
Dizziness.
Chest pains.
Shortness of breath.
Weakness.
Numbness.
Lethargy or a change in mental alertness.

For the most part, again, if you have uncontrolled vomiting for extended periods of time where you can’t keep anything down, you should go to the emergency room. This is especially true for the very young, the elderly or those with significant underlying health conditions, Dr. Lee says.

“Younger and older people are more vulnerable to complications from dehydration,” she says. “They are more susceptible to kidney failure or electrolyte imbalances that can become serious.”

There are several questions a doctor on call will ask (and you can ask yourself) in determining what the cause might be, as well as the most prudent course of action, Dr. Lee says.

Source: Cleveland Clinic