Subtle signs of dehydration are important, as thirst is not usually a helpful indicator. A person who feels thirsty may already be dehydrated. Initial signs to look for include headache, constipation muscle cramps, dry mouth and tongue, and sleepiness or lethargy. Inadequate fluid intake is one of the most common causes of constipation.
Signs of Severe Dehydration
- Little or no urination
- Dark or amber-coloured urine
- Dry skin that stays folded when pinched
- Irritability, dizziness or confusion
- Low blood pressure
- Rapid breathing and heartbeat
- Weak pulse
- Cold hands and feet
Water helps to keep the urinary tract and kidneys healthy. When fluid intake is reduced the risk of urinary tract infections increases. Inadequate hydration is one of the main causes of acute kidney injury.