What are the first signs of dehydration in adults?

The NHS lists the early signs as feeling thirsty, dark yellow and strong-smelling pee, peeing less often than usual, feeling dizzy or lightheaded, feeling tired, and a dry mouth, lips and eyes. Pale or clear pee is a good sign you're drinking enough. If you notice these signs, drink more straight away rather than waiting until you feel very thirsty.

When should I go to the hospital for dehydration?

Go to the ER if you can't keep any fluids down, have hardly peed or not peed all day, feel confused or unusually sleepy, have a fast heartbeat, or feel faint every time you stand. Call 911 if someone collapses, is very hard to wake, or has a seizure. Older adults and people with heart, kidney or diabetes problems should get help sooner.

What is the fastest way to rehydrate?

Sip fluids often rather than drinking a lot at once, which can make you vomit. After vomiting or diarrhoea, an oral rehydration solution from a pharmacy is best because it replaces salts and sugar as well as water. Water, diluted juice and soup also help. If you can't keep anything down for several hours, you need a doctor, who will decide how best to rehydrate you.

Can dehydration cause dizziness and headaches?

Yes. Dehydration lowers the amount of fluid in your blood, which can make you dizzy or lightheaded, especially when you stand up, and it's a common cause of headaches. These usually ease within an hour or two of drinking. A sudden severe headache, or dizziness with fainting or chest pain, is not explained by dehydration and needs urgent help.

Is it dehydration or heat exhaustion?

They often go together. Heat exhaustion adds heavy sweating, feeling hot, cramps, nausea and weakness after time in the heat. Move somewhere cool, lie down with your feet raised, and drink. The NHS says you should start to feel better within 30 minutes. If someone is confused, stops sweating, has hot dry skin or collapses, that may be heatstroke: call 911.

Can I walk in to Emergency Plus for dehydration?

Yes. Emergency Plus in Dabouq, west Amman has emergency doctors on site 24/7 and walk-in care with no appointment. The doctor will check your pulse, blood pressure and temperature, may request blood tests from the on-site laboratory, and will decide how best to rehydrate you. If someone is confused, collapsed or having a seizure, call 911 instead of driving.

Signs of Dehydration in Adults: When to Go to the ER

A long day working in the heat, a bout of vomiting and diarrhoea, or fasting with exertion, and suddenly you feel dizzy, drained and headachy. Dehydration means your body is losing more fluid than it takes in, and it's common in Jordan's dry summer. This guide explains the signs in adults, how to rehydrate at home, and when it becomes an emergency. For children, see child vomiting, diarrhoea and dehydration.

What are the signs of dehydration in adults?

According to the NHS, signs of dehydration include:

Feeling thirsty.
Dark yellow, strong-smelling pee.
Peeing less often than usual.
Feeling dizzy or lightheaded.
Feeling tired.
A dry mouth, lips and eyes.

Dehydration can also cause headaches and dizziness when you stand. If dizziness on standing is your main symptom, read is feeling dizzy when you stand up serious?.

What causes dehydration, and who is most at risk?

Heat and exertion: working or exercising in the sun and sweating heavily, especially in July and August.
Vomiting and diarrhoea: from food poisoning or a stomach bug, which lose both water and salts.
Fever: a high temperature increases fluid loss.
A lot of alcohol or caffeine.
Some medicines: such as diuretics (water tablets), or others that make you pee more.
Poorly controlled diabetes: high blood sugar makes you pee and feel thirsty more.

The NHS notes that older adults are more at risk, because the sense of thirst weakens with age. Anyone with heart or kidney disease, or who takes diuretics, should check with their doctor how much fluid is right for them before changing it a lot.

Mild or severe dehydration?

Level	Typical signs	What to do
Mild	Thirst, dark yellow strong-smelling pee, peeing less, dry mouth and lips, tiredness, mild headache	Drink more in small, frequent sips; oral rehydration solution if you've been vomiting or have diarrhoea
Getting worse	Dizzy or lightheaded when standing, peeing very little, symptoms not improving after 24 hours of drinking	See a doctor or urgent care the same day
Severe	Can't keep fluids down, hardly peeing or not peeing all day, fast heartbeat, confusion, very weak	Go to the ER now
Life-threatening	Very drowsy or hard to wake, collapse, fast weak pulse, seizure, hot dry skin with confusion in the heat	Call 911

When should you go to the ER for dehydration?

Call 911 or go to the ER now if:

You can't keep any fluids down because of vomiting.
You have hardly peed or not peed all day.
Confusion, extreme sleepiness, or being hard to wake.
A fast heartbeat, fast breathing, or feeling faint every time you stand.
Blue, grey, pale or blotchy skin, lips or tongue, or skin that feels cold (the NHS says these can be signs of shock).
Collapse, losing consciousness, or a seizure.
Blood in vomit or poo, or severe tummy pain.
Hot, dry skin with confusion after time in the heat (possible heatstroke).
An older person, or someone with diabetes, kidney or heart disease, who is getting worse.

See a doctor the same day if:

Your symptoms haven't improved after 24 hours of drinking more.
Diarrhoea has lasted more than 7 days or vomiting more than 2 days, as the NHS advises.
You take diuretics, diabetes or blood pressure medicines and you're vomiting or have diarrhoea.
Dizzy spells keep coming back, or you've nearly passed out.

Usually fine at home if:

Thirst, dark pee and mild tiredness, and you can drink and keep fluids down.
Your pee gets paler and you feel better within hours of drinking.
None of the signs in the lists above.

How do you rehydrate at home?

Take small, frequent sips, especially if you feel sick.
After vomiting or diarrhoea, use an oral rehydration solution from a pharmacy, made up exactly as the instructions say.
Water, diluted squash or juice and soup also help. Avoid fizzy drinks, alcohol and a lot of coffee.
Rest somewhere cool and shaded, and loosen tight clothing.
Watch the colour of your pee: pale or clear means you're drinking enough.

If spoiled food is behind it, read food poisoning: when to go to the ER, and if it's the heat, see heatstroke in Amman's summer. If you vape and feel dizzy, our most-read guide, can vaping cause chest pain?, and can vaping cause dizziness or headaches? may help.

What happens when you come to Emergency Plus?

At the emergency department at Emergency Plus in Dabouq, emergency doctors are on site 24/7 and you can walk in without an appointment. You'll be triaged on arrival, then the doctor will ask about your symptoms, how long they've lasted, what you've been drinking and any medicines, check your pulse, blood pressure and temperature, and may request blood tests from the on-site laboratory to check salts and kidney function. The doctor will decide how best to rehydrate you, and the team will explain the right next step.

Can't keep fluids down?

For confusion, collapse or a seizure, call 911 and don't drive yourself. If symptoms are milder but not improving, the emergency department at Emergency Plus in Dabouq, Amman is open 24/7 with no appointment, with an Arabic and English speaking team.

Call our 24/7 ER: +962 79 247 1313

Sources

Medical disclaimer: This article is for general information only and is not a substitute for professional medical advice, diagnosis, or treatment. If you think you are experiencing a medical emergency, call 911 or go to the nearest emergency department immediately. Emergency Plus in Dabouq, Amman is open 24/7 — +962 79 247 1313.