This can lead to varicose veins. Varicose veins look dark blue, swollen, and twisted under the skin. Some people do not have any symptoms. Mild symptoms may include: 1  Heaviness, burning, aching, tiredness, or pain in your legs.2  Symptoms may be worse after you stand or sit for long periods of time. 3  Swelling in your feet and ankles. 4  Itching over the vein.aricose veins are common and usually aren't a sign of a serious problem. But in some cases, varicose veins can be a sign of a blockage in the deeper veins called deep vein thrombosis. If you have this problem, you may need treatment for it. Your doctor will look at your legs and feet.
Dehydration. Dehydration is the most common cause of decreased urine output. Typically, dehydration occurs when you are ill with diarrhea, fever, or another sickness and cannot replace the fluids that you are losing and your kidneys retain as much fluid as possible.any things can cause oliguria, or a decreased urine output. These range from temporary conditions to more serious illnesses. Dehydration is the most common cause of decreased urine output.
from the adrenal glands, and thirst (as osmolality rise of about 1% causes thirst). Because of these kidney control mechanisms, drinking one liter of water would cause the urine. output to increase about nine times after about 45 minutes (due to absorption of water in the gut) and continue for about two hours.