Urea, together with water and other waste substances, forms the urine as it passes through the nephrons and down the renal tubules of the kidney. From the kidneys, urine travels down two thin tubes called ureters to the bladder. The ureters are about 8 to 10 inches long. Muscles in the ureter walls constantly tighten and relax to force urine downward away from the kidneys. If urine is allowed to stand still, or back up, a kidney infection can develop. Small amounts of urine are emptied into the bladder from the ureters about every 10 to 15 seconds.
Stress is one of the main causes of headaches. And once you have a tension headache, you may be sensitive to light or sound. To counteract this, sit or lie down in a dimly lit room. Close your eyes and try to relax your back, neck, and shoulders. Turn off sources of noise like a television, computer, or cellphone.
Finally, there are sinus headaches, which can be experienced after a cold or other medical condition. Water can aid as a treatment to all of these headaches. In tension headaches, it was noted above that a cause can be fatigue. Fatigue is a side effect of dehydration. So, if dehydration is the cause of the fatigue and fatigue is the cause of the headache- start by treating the fatigue and get hydrated. Tension headaches could also be a symptom of other problems, so if they persist it is a good idea to seek help from a medical professional. Cluster headaches are also known to be cured by drinking water.