4. Dehydration
Dehydration means the body is losing more fluids than you are able to put back in: This can happen when you aren’t drinking enough water or juice on a warm day, or it can happen in the midst of competitive sports or exercise – but it can also happen due to any number of different infections and medical conditions that cause vomiting, diarrhea or frequent urination.
Dehydration is dangerous because it depletes the body and places an increasing amount of stress on the organs, including the kidneys and the heart.
Signs and symptoms of severe dehydration can include a dry mouth, difficulty swallowing, a severe headache, bloodshot eyes, circles under the eyes and pain in the back (which indicates the effect on the kidneys).
It can also often include nausea, dizziness, and vomiting: Sometimes separately, but sometimes also as a combined three.
Rehydrate where possible and seek emergency medical attention.