C. The anxiety and worry are associated with three (or more) of the following six symptoms (with at least some symptoms having been present for more days than not for the past 6 months): Note: Only one item is required in children. 1. Restlessness or feeling keyed up or on edge. 2. Being easily fatigued.
Your doctor may order a serum phosphorus test if they suspect that your phosphorus level is too low or too high. Either extreme can lead to health problems. Symptoms that may indicate your phosphorus level is too low include: changes in your mental state (for example, anxiety, irritability, or confusion) bone issues, such as pain, fragility, and poor development in children
Diseases such as anorexia, diabetes, and even alcoholism cause low phosphorus levels in the blood. People suffering from Celiac disease or Crohn's disease may also report low phosphorus levels leading to brittle and fragile bones, constant fatigue, and loss of appetite, weight fluctuations, anxiety, and stiff joints. Elevated phosphorus levels in the blood on the other hand are a more common problem.