Types

Dehydration (Adult)

Choose a preferred language

Dehydration occurs when your body loses too much fluid. This may be the result of prolonged vomiting or diarrhea, excessive sweating, or a high fever. It may also happen if you don’t drink enough fluid when you’re sick or out in the heat. Some medicines, such as water pills (diuretics), can also be a cause.

Symptoms include thirst, less urine than usual, and darker-colored urine. You may also feel dizzy, weak, very tired, or very drowsy. You may also have muscle aches and headache. The diet described below is usually enough to treat dehydration. In severe cases, however, you may need intravenous (IV) fluids and medicines at the hospital.


Home care

  • Drink plenty of fluids, such as:

    • Oral rehydration solution

    • Water

    • Lemonade

    • Low sugar orange, apple, grape, or cranberry juice

    • Clear fruit drinks

    • Sports drinks

    • Caffeine-free tea

    • Decaffeinated coffee

  • Don't drink alcohol.

  • If you have been diagnosed with kidney disease or heart failure, ask your healthcare provider how much and what types of fluids you should drink to prevent dehydration. These diseases can cause fluid to build up in the body. This can be dangerous to your health.

  • If you have a fever, muscle aches, or a headache from a cold or flu, you may take acetaminophen, naproxen, or ibuprofen, unless another medicine was prescribed. Talk with your healthcare provider before using these medicines if you have chronic liver or kidney disease, or had a stomach ulcer or digestive bleeding.


Follow-up care

Follow up with your healthcare provider as advised.


When to get medical advice

Call your healthcare provider right away if any of these occur:

  • Continued vomiting

  • Diarrhea that happens more than 5 times a day, or mucus or blood in diarrhea

  • Swollen belly (abdomen) or belly pain that gets worse

  • Less urine than usual or extreme thirst

  • Fever of 100.4°F (38°C) or higher, or as directed by your healthcare provider

  • Diarrhea in an infant, older person, or a person with low immunity or underlying health conditions.


Call 911

Call 911 right away if you have any of the following:

  • Weakness, dizziness, or fainting

  • Unusual drowsiness or confusion

  • Vomit or stool is red or black

Online Medical Reviewer: Rita Sather RN

Online Medical Reviewer: Ronald Karlin MD

Online Medical Reviewer: Shaziya Allarakha MD

Date Last Reviewed: 02/01/2025

© 2000-2026 The StayWell Company, LLC. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.
Suitcase Icon

Learn More About Health Services at PIH Health

Expert care for every stage of life. Explore the comprehensive services offered at PIH Health.

Explore Services
Newspaper Icon

Get Health Tips & Updates

Sign up for helpful health information, wellness tips and news from PIH Health, delivered straight to your inbox.

Subscribe
Related Articles
Read article
Urgent Care
Scalp Bruise

A bruise contusion can cause swelling, pain, and changes in skin color. Read on to learn how to care for a bruise.

Read article
Urgent Care
Chest Wall Pain: Costochondritis

Learn how to care for yourself at home when you have chest pain caused by costochondritis.

Read article
Urgent Care
Hip Bruise

A hip contusion can cause swelling, pain, and changes in skin color. Here's how to care for yourself at home.

Read article
Urgent Care
Jaw Fracture

You have a broken jaw, or mandible bone. This is called a jaw fracture. It may be a minor break in the bone. Or you may have a major break, with the bone moving out of place. Learn how to care for the fracture as you heal.

Stethoscope Icon

Personalized Care Starts with the Right Provider

Search by specialty, location, and more.

Find A Doctor
Appointments Icon

Make an Appointment

Your health can't always wait. Schedule an appointment with a PIH Health provider.

Schedule an Appointment
Cross Icon

Find a PIH Health Urgent Care Location

Need care today?. Find the nearest PIH Health Urgent Care location.

Find Urgent Care