What are the symptoms of vomiting and diarrhea?
Vomiting and diarrhea usually come with nausea, abdominal cramps, low-grade fever, and loss of appetite. The most important symptoms to watch are signs of dehydration — dry mouth, dark urine, dizziness, and reduced urination — because dehydration is the main danger.
The Typical Symptom Picture
Vomiting and diarrhea rarely occur alone. When they come from a stomach virus or food poisoning, they usually travel with a cluster of related symptoms:
- Nausea and repeated vomiting — often the body’s first response to an infection or spoiled food.
- Watery diarrhea — frequent loose stools, often with urgency.
- Abdominal cramps — waves of belly pain or spasms that may briefly ease after vomiting or a bowel movement.
- Low-grade fever — a mild temperature rise is common with viral gastroenteritis and usually passes on its own.
- Loss of appetite — not wanting to eat or drink, which makes fluid loss worse if it continues.
- Muscle aches and tiredness — a general run-down feeling as your body fights the infection.
The Symptom That Matters Most: Dehydration
The vomiting and diarrhea themselves are usually not what harms you — losing too much fluid is. Watch specifically for:
- Increased thirst and a dry, sticky mouth
- Urinating less often, with dark, concentrated urine
- Headache, tiredness, and dizziness or lightheadedness when you stand
- A rapid heartbeat
These are the signals that your body is running low on fluid and electrolytes.
Dehydration Looks Different by Age
In infants and young children, the warning signs are: no wet diaper in six to eight hours, no tears when crying, a sunken soft spot on the head, dry mouth, sunken eyes, and unusual drowsiness or floppiness.
In older adults, dehydration often shows up as confusion, a rapid heartbeat, lightheadedness on standing, and little or no urination — sometimes before thirst is even noticed.
Symptoms That Point to Something More Serious
Most symptoms of a stomach bug are unpleasant but not dangerous. These are different and should be evaluated promptly: blood in vomit or vomit resembling coffee grounds; bloody, maroon, or black tarry stool; severe or worsening abdominal pain; high or persistent fever; a stiff neck; or confusion. These can signal internal bleeding, appendicitis, or another problem beyond a simple stomach bug.
For a complete guide to causes and treatment, see our vomiting and diarrhea page. Bellaire ER is open 24/7 at 5302 Bellaire Blvd — walk in anytime or call (713) 660-0001.