Water is found in the home in features such as fountains and aquariums, or is represented by the colours black and blue. In the body, water represents the bladder and kidneys. When there is an excess of water energy in a person's body, they may suffer from problems with the bladder or prostate, kidney stones, high blood pressure, dizziness or vertigo. There is also a tendency to become paranoid and suspicious. People who suffer from a deficiency of water energy may develop dark circles under their eyes, a sign of weak kidneys and adrenal function. In such cases, there may be frequent urination and reduced libido, as well as lower-back pain and cold hands and feet. People in this condition can also lack motivation and have a tendency to procrastinate that may develop into hopelessness and depression. Placing a water feature in a bedroom and leaving it on permanently will result in excessive water energy building up in the home. Water features should be placed in a public area, where no-one sleeps, such as the living or dining room. To further reduce the amount of water energy in an environment, consider using the wood element; water produces wood. This may be in the form of plants or the colour green. To increase the water energy within a home or office, use the metal element; metal produces water. This may be in the form of metallic objects and colours such as white, grey and silver.