Cyclic vomiting syndrome is characterized by episodes of severe vomiting that have no apparent cause. Episodes can last for hours or days and alternate with symptom-free periods. Episodes are similar, meaning that they tend to start at the same time of day, last the same length of time, and occur with the same symptoms and intensity.
Cyclic vomiting syndrome occurs in all age groups, though it often begins in children around 3 to 7 years old. Although it's more common in children, the number of cases diagnosed in adults is increasing.
The syndrome is difficult to diagnose because vomiting is a symptom of many disorders. Treatment often involves lifestyle changes to help prevent the events that can trigger vomiting episodes. Medications, including anti-nausea and migraine therapies, may help lessen symptoms.
The symptoms of cyclic vomiting syndrome often begin in the morning. Signs and symptoms include:
Other signs and symptoms during a vomiting episode may include:
Call your doctor if you see blood in your or your child's vomit.
Continued vomiting may cause severe dehydration that can be life-threatening. Call your doctor if you or your child is showing symptoms of dehydration, such as:
The underlying cause of cyclic vomiting syndrome is unknown. Some possible causes include genes, digestive difficulties, nervous system problems and hormone imbalances. Specific bouts of vomiting may be triggered by:
Identifying the triggers for vomiting episodes may help with managing cyclic vomiting syndrome.
The relationship between migraines and cyclic vomiting syndrome isn't clear. But many children with cyclic vomiting syndrome have a family history of migraines or have migraines themselves when they get older. In adults, the association between cyclic vomiting syndrome and migraine may be lower.
Chronic use of marijuana (Cannabis sativa) also has been associated with cyclic vomiting syndrome because some people use marijuana to relieve their nausea. However, chronic marijuana use can lead to a condition called cannabis hyperemesis syndrome, which typically leads to persistent vomiting without normal intervening periods. People with this syndrome often demonstrate frequent showering or bathing behavior.
Cannabis hyperemesis syndrome can be confused with cyclic vomiting syndrome. To rule out cannabis hyperemesis syndrome, you need to stop using marijuana for at least one to two weeks to see if vomiting lessens. If it doesn't, your doctor will continue testing for cyclic vomiting syndrome.
Cyclic vomiting syndrome can cause these complications:
Many people know what triggers their cyclic vomiting episodes. Avoiding those triggers can reduce the frequency of episodes. While you may feel well between episodes, it's very important to take medications as prescribed by your doctor.
If episodes occur more than once a month or require hospitalization, your doctor may recommend preventive medicine, such as amitriptyline, propranolol (Inderal), cyproheptadine and topiramate.
Lifestyle changes also may help, including:
Cyclic vomiting syndrome can be difficult to diagnose. There's no specific test to confirm the diagnosis, and vomiting is a sign of many conditions that must be ruled out first.
The doctor will start by asking about your child's or your medical history and conducting a physical exam. The doctor will also want to know about the pattern of symptoms that you or your child experiences.
After that, the doctor may recommend:
There's no cure for cyclic vomiting syndrome, though many children no longer have vomiting episodes by the time they reach adulthood. For those experiencing a cyclic vomiting episode, treatment focuses on controlling the signs and symptoms. You or your child may be prescribed:
The same types of medications used for migraines can sometimes help stop or even prevent episodes of cyclic vomiting. These medications may be recommended for people whose episodes are frequent and long lasting, or for people with a family history of migraine.
IV fluids may need to be given to prevent dehydration. Treatment is individualized based on the severity and duration of symptoms as well as the presence of complications.
Lifestyle changes can help control the signs and symptoms of cyclic vomiting syndrome. People with cyclic vomiting syndrome generally need to get adequate sleep. Once vomiting begins, it may help to stay in bed and sleep in a dark, quiet room.
When the vomiting phase has stopped, it's very important to drink fluids, such as an oral electrolyte solution (Pedialyte) or a sports drink (Gatorade, Powerade, others) diluted with 1 ounce of water for every ounce of sports drink.
Some people may feel well enough to begin eating a normal diet soon after they stop vomiting. But if you don't or your child doesn't feel like eating right away, you might start with clear liquids and then gradually add solid food.
If vomiting episodes are triggered by stress or excitement, try during a symptom-free interval to find ways to reduce stress and stay calm. Eating small meals and low-fat snacks daily, instead of three large meals, also may help.
Alternative and complementary treatments may help prevent vomiting episodes, although none of these treatments has been well-studied. These treatments include:
Coenzyme Q10, L-carnitine and riboflavin may work by helping your body overcome difficulty in converting food into energy (mitochondrial dysfunction). Some researchers believe mitochondrial dysfunction may be a factor causing both cyclic vomiting syndrome and migraine.
Be sure to see a doctor and have the diagnosis of cyclic vomiting syndrome confirmed before starting any supplements. Always check with your doctor before taking any supplements to be sure you or your child is taking a safe dose and that the supplement won't adversely interact with any medications you're taking. Some people may experience side effects from coenzyme Q10, L-carnitine and riboflavin that are similar to the symptoms of cyclic vomiting syndrome, including nausea, diarrhea and loss of appetite.
Because you never know when the next episode might occur, cyclic vomiting syndrome can be difficult for the whole family. Children may be especially concerned, and may worry constantly that they'll be with other children when an episode happens.
You or your child may benefit from connecting with others who understand what it's like to live with the uncertainty of cyclic vomiting syndrome. Ask your doctor about support groups in your area.
You're likely to start by seeing your primary care doctor or your child's pediatrician. But you may be referred immediately to a digestive diseases specialist (gastroenterologist). If you or your child is in the middle of a severe vomiting episode, the doctor may recommend immediate medical care.
Here's some information to help you get ready for your appointment and know what to expect from the doctor.
Some basic questions to ask the doctor include:
Don't hesitate to ask other questions that occur to you during your appointment.
Be ready to answer questions your doctor may ask:
The doctor will likely want to see you or your child immediately if an episode of severe vomiting is underway. But if the vomiting has passed, get plenty of rest, drink extra fluids and follow an easy-to-digest diet. It's also a good idea to avoid caffeinated beverages or foods containing caffeine, as these may trigger symptoms.