Information for the public

Signs that could mean you are getting too little fluid or too much fluid, or the balance of fluids is wrong

Signs that could mean you are getting too little fluid or too much fluid, or the balance of fluids is wrong

Signs that could mean you are getting too little fluid

  • Feeling thirsty.

  • Not passing very much urine, and your urine is dark and strong‑smelling.

  • Dry or sticky mouth, coated ('furry') tongue, cracked lips.

  • Feeling dizzy, especially when you stand up.

Signs that could mean you are getting too much fluid

  • Passing a lot of urine.

  • Feeling out of breath, especially when you're lying down.

  • Puffiness or swelling, especially around your face and ankles. This can be serious, so if you think there's a problem, tell a doctor or nurse straight away.

Symptoms of having the wrong balance of fluids

  • Feeling tired or drowsy.

  • Headaches.

  • Seizures (fits).

  • Information Standard