Chinese Restaurant Syndrome: Causes, Symptoms, and Treatment
Medically reviewed by Achuta Uppu, MD, Internal Medicine. Last reviewed: October 23, 2026.
What kind of doctor treats Chinese Restaurant Syndrome?
An allergist (a doctor who treats allergies) or a primary care doctor can look at symptoms that start after a meal. Most symptoms are mild and short. Some signs, such as chest pain, need emergency care. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What is Chinese restaurant syndrome?
Chinese restaurant syndrome is another name for MSG symptom complex. It is a set of symptoms linked to eating food with the additive MSG, short for monosodium glutamate. An additive is something added to food.
MSG is the sodium salt of glutamic acid, a common amino acid. An amino acid is a building block of protein. MSG is found naturally in our bodies and in many foods, including cheese and tomatoes. It is also added to many foods as a flavor enhancer.
Other names include Kwok's syndrome, MSG syndrome, and hot dog headache. Reports of reactions to MSG began in 1968, in a letter in the New England Journal of Medicine. Since then, some people have said they had symptoms after eating food with MSG.
Symptoms
Symptoms, if they occur, are usually mild and go away in a short time. They can include:
- Flushing, which is reddening of the skin.
- Headache.
- Muscle aches.
- Numbness or burning in or around the mouth.
- Tingling.
- Drowsiness, which means feeling sleepy.
The FDA has received reports of headache and nausea after eating foods with MSG. The FDA was never able to confirm that MSG caused these effects. A pounding or racing heart (heart palpitations) can be a sign of a serious problem, so read the emergency advice below.
Causes and who gets it
Studies on MSG in foods have not found a conclusive link between MSG and the symptoms some people describe. The FDA did a study of the issue. It found no evidence that MSG in food caused symptoms.
In studies, people who said they were sensitive to MSG were given MSG or a placebo. A placebo is a dummy dose that has no MSG. Scientists were not able to consistently trigger reactions.
The FDA report did find minor reactions in people who took 3 or more grams of MSG alone, without food. Most foods with MSG have less than 0.5 grams of the additive.
One review looked at human studies of MSG and headache. The results were not consistent. The authors said it seems too early to conclude that MSG in food causes headache.
Glutamate also comes from protein in other foods. An average adult eats about 13 grams of glutamate each day from the protein in food. Added MSG is estimated at around 0.55 grams per day.
How doctors diagnose it
There are no tests for MSG symptom complex.
Some signs can point to an allergic reaction or another serious illness. These include chest pain and shortness of breath. Doctors take these signs seriously.
Treatment
Most symptoms are mild, such as headache or flushing, and need no treatment. Most people get better without treatment and have no lasting problems.
If you want to limit MSG, food labels can help. The FDA requires foods with added MSG to list it as monosodium glutamate on the package. Some ingredients have glutamate naturally. Examples are hydrolyzed vegetable protein, autolyzed yeast, yeast extract, and soy extracts. These must be listed too. The label does not have to say they contain glutamate.
Foods with these ingredients cannot say “No MSG” or “No added MSG” on the package.
When to see a doctor
Get emergency medical help right away if you have signs of a possible allergic reaction or another serious illness. These include chest pain, a pounding or racing heart (heart palpitations), shortness of breath, or swelling of the lips or throat. Call 911 or go to the emergency room if you have any of these signs.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. Either kind of doctor can review your symptoms and what you ate before they started. They can also refer you to an allergist if needed.
Common questions
Is Chinese restaurant syndrome real?
Some people do report symptoms after eating food with MSG, but studies have not found a conclusive link between MSG and those symptoms. The symptoms people describe are usually mild and go away quickly.
Is MSG safe to eat?
Yes, the FDA considers MSG generally recognized as safe. The FDA did a study and found no evidence that MSG in food caused symptoms. The FDA report did find minor reactions in people who took 3 or more grams of MSG alone, without food.
Does MSG cause headaches?
No, that has not been proven. A review of human studies found inconsistent results. It said it seems too early to conclude that MSG in food causes headache.
How can I tell if a food has MSG?
Look at the ingredient list. The FDA requires foods with added MSG to list it as monosodium glutamate. Some other ingredients, such as yeast extract, also contain glutamate naturally.
Does glutamate mean a food has gluten?
No, glutamate has nothing to do with gluten. Glutamate and glutamic acid are not the same as gluten. A person with celiac disease may react to the wheat in soy sauce, but not to the MSG in it.
Sources
- MedlinePlus - MSG symptom complex
- U.S. Food and Drug Administration - Questions and Answers on Monosodium glutamate (MSG)
- National Library of Medicine (PubMed Central) - Does monosodium glutamate really cause headache? A systematic review of human studies
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
