Dehydration in Adolescents

Medically reviewed by Drugs.com. Last updated on Oct 4, 2026.

What is dehydration?

Dehydration is a condition that develops when your body does not have enough fluid. You may become dehydrated if you do not drink enough water or lose too much fluid. Fluid loss may also cause loss of electrolytes (minerals), such as sodium.

What increases my risk for dehydration?

• Vomiting, diarrhea, or fever
• Being in the sun or heat for too long
• Sweating while playing sports
• Medical conditions, such as diabetes, or infections
• Medicines that cause you to lose water and salt, such as diuretics (water pills)

What are the signs and symptoms of dehydration?

• Dry eyes or mouth
• Increased thirst
• Dark yellow urine
• Urinating little or not at all
• Tiredness or body weakness
• Headache, dizziness, or confusion
• Irregular or fast breathing, fast or pounding heartbeat, and low blood pressure
• Sudden weight loss

How is dehydration diagnosed?

Your healthcare provider will examine you and check your breathing and heartbeat. Your provider will look at your eyes, skin, mouth, and tongue. Your provider will ask you how much liquid you have been drinking, and how much you are urinating. Tell your provider if you have been vomiting or have diarrhea. Blood and urine tests are used to check your electrolyte levels. The tests may show the cause of your dehydration, such as infection or diabetes. The tests may also show if your kidneys are working correctly.

How is dehydration treated?

• An oral rehydration solution (ORS) contains the right amount of salt, sugar, and minerals in water to replace body fluids. Do not drink sports drinks instead of an ORS. Do not drink soft drinks or fruit juices. These are high in sugar and can make dehydration worse.
• Liquids may be given through an IV or under your skin if you have severe dehydration. Electrolytes will also be included in the liquids.

Treatment options

The following list of medications are related to or used in the treatment of this condition.

• lvp solution
• Isolyte S
• Normosol-R
• Plasma-Lyte 148
• Isolyte S PH 7.4

What can I do to prevent dehydration?

• Drink liquids as directed. Liquids that contain water, sugar, and minerals can help your body hold in fluid and help prevent dehydration. Drink liquids throughout the day, not just when you feel thirsty. Drink even more liquid if you will be outdoors, in the sun for a long time, or exercising. If you are vomiting, try to drink small amounts of liquid every 5 to 10 minutes. Slowly increase the amount as you are able. If you vomit again, rest for an hour. Then start again with small amounts.
• Stay cool. Limit the time you spend outdoors during the hottest part of the day. Dress in lightweight clothes.
• Keep track of how often you urinate. If you urinate less than usual or your urine is darker, drink more liquids.

Call your local emergency number (911 in the US) or have someone call if:

• You have a seizure.
• You are confused or cannot think clearly.
• You are extremely sleepy, or another person cannot wake you.
• You have trouble breathing.

When should I seek immediate care?

• You become dizzy or faint when you stand.
• You are not able to urinate.
• You have a fast or irregular heartbeat.
• Your hands or feet are cold, or your face is pale.

When should I call my doctor?

• You have trouble drinking liquids because you are vomiting.
• You have episodes of vomiting for longer than 24 hours.
• You have episodes of diarrhea for longer than 2 days.
• Your symptoms get worse.
• You have a fever.
• You feel very weak or tired.
• You have questions or concerns about your condition or care.

Care Agreement

You have the right to help plan your care. Learn about your health condition and how it may be treated. Discuss treatment options with your healthcare providers to decide what care you want to receive. You always have the right to refuse treatment. The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

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Further information

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