When dehydrated, vomit often turns clear, then yellow, and eventually green, as the stomach empties and you start bringing up bile, a yellow-green fluid from the liver, indicating severe fluid loss and an empty stomach, which needs rehydration and sometimes medical attention.
Red Vomit (hematemesis)
When you have a significant amount of vomit that is bright red in color or resembles coffee grounds, you should contact your doctor immediately. This can be the result of multiple conditions including, but not limited to: Liver failure. Cancer of the stomach, pancreas, or esophagus.
Symptoms like lightheadedness, muscle cramps, and general weakness are indications that the body is failing to compensate for dehydration. Nausea and vomiting are particularly bad because they can cause the situation to get worse.
Bilious vomiting is when a baby's vomit is a colour ranging from yellow to green. It is usually a sign of a twisted or blocked bowel, which is a medical emergency.
Yellow-colored vomit can happen for several reasons. If you have an empty stomach and the only content of the vomit is bile, you will notice yellow-colored bile in your vomit. It can also happen when you have morning sickness or dehydration, and lack of fluids is affecting the color of the bile content in the vomit.
Liquids You May Give
Clear liquids include lemonade, fruit juices without pulp (cranberry, cranapple, or apple juice), and popsicles. The popsicles must be free from cream, pudding, yogurt, or bits of fruit. Your child may need to drink an oral rehydration solution (ORS) like Pedialyte®.
Watch for blood or green/brown vomit, projectile vomiting, severe pain, signs of dehydration (dry mouth, no tears, less urination), high fever, lethargy, stiff neck, or vomiting after a head injury, as these are key red flags needing urgent medical attention, especially for infants or when vomiting persists beyond 24 hours without diarrhea, indicating potentially serious issues like obstruction, infection, or metabolic problems.
Bile is a greenish-yellow type of special digestive liquid that causes your vomit to change colour when there is no presence of food in the stomach. Therefore, this causes your vomit to present as a green or yellow colour.
According to the NHS, people should also seek emergency medical care if they experience any of the following symptoms in addition to throwing up bile: chest pain. unintentional weight loss. severe and sudden abdominal pain.
Symptoms of dehydration
Headaches. Irregular or fast heart rate (arrhythmia). Muscle cramps, muscle spasms or weakness. Nausea and vomiting.
Severe dehydration can lead to serious complications, including:
Seek medical attention urgently for accurate diagnosis and treatment if your vomit is red, brown, or black colored and accompanied by unsettling symptoms like abdominal pain, chest pain, fever, chills, and signs of dehydration.
Make an appointment with your doctor if: Vomiting lasts more than two days for adults, 24 hours for children under age 2 or 12 hours for infants. You've had bouts of nausea and vomiting for longer than one month. You've experienced unexplained weight loss along with nausea and vomiting.
Composition of normal gastric juice
Appearance colourless-grey fluid. pH 1.0–1.5 due to the HCl produced by the parietal cells.
White colored vomit is usually a product of mucus and stomach acid. If it's foamy, there's probably some air mixed up in there, too. Unless you have other symptoms, it's rarely something to worry about. “If your vomit is white or foamy, it usually means you have acid reflux, indigestion or the start of an infection.
Most people with dumping syndrome develop symptoms, such as stomach cramps and diarrhea, 10 to 30 minutes after eating. Other people have symptoms 1 to 3 hours after eating. And still others have both early and late symptoms. Generally, you can help prevent dumping syndrome by changing your diet after surgery.
Bile is a liquid the liver makes to help digest food. Sometimes, this liquid then backs up into the esophagus, the tube that connects the mouth and stomach. Bile reflux may happen due to an incompetent sphincter between the stomach and the small intestine, known as the pylorus.
Symptoms may include.
Grade 1: intervention not indicated. Grade 2: outpatient IV hydration; medical intervention indicated. Grade 3: tube feeding, TPN or hospitalisation indicated. Grade 4: life-threatening consequences.
Seek immediate medical attention
You have signs or symptoms of dehydration — excessive thirst, dry mouth, infrequent urination, dark-colored urine and weakness, or dizziness or lightheadedness upon standing. Your vomit contains blood, resembles coffee grounds or is green.
Symptoms of a more severe imbalance depend on the type of disorder. Dehydration may make your child's urine appear darker than usual. Other electrolyte disorders cause confusion, weakness, cramping, and muscle spasms. Some can cause difficulty breathing, dizziness, and a rapid heart rate.
The fastest way to hydrate is using an Oral Rehydration Solution (ORS) or a sports drink with electrolytes (sodium/potassium) for rapid absorption, especially after significant fluid loss like sweating or vomiting; otherwise, water is best, but for severe cases, IV fluids are needed. Drink small, frequent sips, and supplement with water-rich foods like watermelon or cucumber for quicker rehydration.
The vomiting reflex is mediated by both the autonomic and somatic systems, and consists of two phases: