When should I go to the ER for vomiting and diarrhea?

Making the Decision

Deciding where to go for vomiting and diarrhea comes down to two questions: Can you replace the fluid you are losing, and are there any warning signs? Use the tiers below to match your situation to the right level of care.

Go to the ER Now

Come to Bellaire ER without delay if any of these apply:

• You cannot keep any liquid down — every sip comes back up, so you cannot rehydrate on your own.
• Blood in vomit or stool, vomit like coffee grounds, or black, tarry stool.
• Severe or worsening abdominal pain, particularly in the lower right side.
• High or persistent fever, stiff neck, or confusion.
• Signs of significant dehydration — dizziness, racing heart, very dark urine, or little to no urination.
• The person is at higher risk — an infant, an older adult, someone pregnant, or someone with diabetes or a weakened immune system — and cannot stay hydrated.

Call 911 instead of driving if vomiting comes with sudden severe headache, chest pain, one-sided weakness, or slurred speech.

Timing Matters: Don’t Wait It Out If…

A stomach bug should be trending better, not worse. Seek ER care if symptoms last more than two to three days without improving, or if a young child, older adult, or higher-risk person cannot hold down fluids for even a few hours. Prolonged fluid loss leads to dehydration and electrolyte imbalances that often need IV treatment to correct quickly.

When Telemedicine or Urgent Care Is Reasonable

If your symptoms are mild, you are keeping some fluids down, and there are no red flags, you have good options short of the ER:

• Telemedicine — a clinician can advise on rehydration and anti-nausea options and tell you whether testing is needed. Bellaire ER offers telemedicine for exactly this kind of guidance.
• Urgent care — appropriate for mild, stable symptoms during their open hours.
• Your primary care doctor — a good choice for ongoing symptoms without warning signs, or for help judging a child’s hydration.

When Home Care Is Enough

For a straightforward stomach bug with no red flags, rest, sip an oral rehydration solution or clear fluids frequently in small amounts, and ease back to bland foods as tolerated. Most cases improve within one to three days. If you are unsure or symptoms worsen, the ER is the safer choice.

For a complete guide, see our vomiting and diarrhea page. Bellaire ER is open 24/7, 365 days a year, at 5302 Bellaire Blvd — walk in anytime or call (713) 660-0001.