Many conditions cause nausea. Anything that irritates the stomach can cause vomiting.

Causes for nausea include:

• Drinking too much alcohol
• Medication side effect
• Food poisoning
• Gastroenteritis
• Motion sickness
• Overeating
• Pregnancy
• Viral syndrome
• Pneumonia
• Influenza
• Sinusitis
• Tonsillitis
• Common cold
• Bronchitis
• Fever
• Drug withdrawal
• Alcohol withdrawal

Serious causes for sudden nausea include:

• Heart attack
• Cardiac arrhythmia
• Pulmonary embolism
• Stroke
• Poisoning
• Drug toxicity

Chronic conditions that cause nausea include:

• Type 1 diabetes
• Type 2 diabetes
• CHF
• COPD
• Peptic ulcer disease
• Biliary tract disease
• Gallbladder disease
• Gastritis
• Liver failure
• Kidney failure