2. Fatigue

The doctor might be unaware that a patient has hyperparathyroidism because sometimes it produces no obvious symptoms. The diagnosis often only emerges from blood tests performed in connection with some other condition. Fatigue is one of the ways hyperparathyroidism might affect a person. If someone feels unusually worn out and cannot link these feelings with any work pressures, school exams or domestic problems, it is advisable to get a blood test and see if there are any signs of hyperparathyroidism or some other condition behind this lack of energy.