Anxiety causes fear and uneasiness in response to stress, like an upcoming presentation or test. Some people develop generalized anxiety disorder (GAD) if anxiety is long-term.
Your gut has millions of nerve cells that communicate with your brain. Anxious thoughts may impact the nerve cells in your gut. As a result, you may develop nausea.
Cannabinoid Hyperemesis Syndrome
Cannabis, which some people use to relieve nausea, may have the opposite effect. Cannabinoid hyperemesis syndrome (CHS) causes severe abdominal pain, nausea, and vomiting.
Some research suggests prolonged cannabis use inactivates specific receptors in your brain, leading to nausea.
You can alleviate CHS by stopping cannabis use. Limited evidence suggests that capsaicin, a component in chili peppers that makes your mouth feel hot, may treat CHS. Applying topical capsaicin to your abdomen produces heat, which may alleviate nausea.
Cyclic Vomiting Syndrome
Cyclic vomiting syndrome causes repeated, sudden attacks of severe nausea, tiredness, and vomiting. A single episode can last from one hour to 10 days. Cyclic vomiting syndrome is more common among children than adults.
Experts say cyclic vomiting syndrome is a related to migraines. People with cyclic vomiting syndrome often have a family history of migraines.
You may develop nausea if there’s a blockage in your digestive system or if something irritates your gut. Some of nausea’s most common digestive causes include gallbladder disease, gastroesophageal reflux disease (GERD), and gastroparesis.
Your gallbladder stores bile, which your liver makes to help digest fat. When you digest food, your gallbladder releases bile through a tube to your small intestine.
Sudden right-side abdominal pain after a heavy meal is a classic sign of a gallbladder attack. The pain usually strikes when gallstones, or hard particles, block the tube carrying bile to your small intestine.
Gastroesophageal Reflux Disease
Gastroesophageal reflux disease (GERD) causes your stomach contents to travel into your esophagus. Your stomach contents are highly acidic, which irritates your esophagus. As a result, you may develop heartburn.
GERD may cause nausea if you taste your stomach contents in the back of your mouth. Research has found that some people with GERD have bouts have nausea and vomiting.
Gastroparesis is a digestive disorder that slows food movement from the stomach to the small intestine. It’s unclear what causes gastroparesis. Gastroparesis may occur if something disrupts nerve signals to the stomach. Often, the disorder is a complication of diabetes.
Some people get motion sickness when traveling by airplanes, boats, cars, and trains. Motion sickness happens if your body gets mixed signals about whether you are moving.
For example, you may develop motion sickness if you are focused on a book or your phone while traveling. In that case, your inner ears detect that you are moving, but your eyes do not. As a result, you may have nausea or vomiting.