Nausea involves a complex interplay between your digestive system and brain. Your stomach's normal rhythmic contractions can become disrupted, a condition called gastric dysrhythmia. This sends signals to your brain's 'vomiting center', triggering the sensation of nausea. Hormones and neurotransmitters like serotonin play a key role in this process.

While nausea is often associated with the stomach, it can originate from various parts of your body. Your inner ear, which controls balance, can trigger nausea when disrupted (think motion sickness). The brain itself can cause nausea in conditions like migraines or concussions. Even your heart can be involved - nausea can sometimes be a symptom of a heart attack, especially in women.

Chronic nausea can significantly affect your quality of life. It can lead to decreased appetite and unintended weight loss. Many people with frequent nausea experience anxiety about eating or going out in public. Sleep disturbances are common. In severe cases, nausea can lead to social isolation and depression. Understanding and addressing the underlying cause is crucial for improving overall well-being.

While unpleasant, nausea is your body's way of communicating that something isn't right - paying attention to this symptom can lead to better overall health.