If you are planning to see your doctor about depression, here is information about the kinds of tests your doctor might order. First, keep in mind that not every test is a "depression test." Some tests aren't used to diagnose clinical depression but rather to rule out other serious medical conditions that may cause similar symptoms.
If you've been diagnosed with clinical depression, you may be having trouble getting to sleep or staying asleep. There's a reason for that. There is a definite link between lack of sleep and depression. In fact, one of the common signs of depression is insomnia or an inability to fall and stay asleep.
That's not to say insomnia or other sleep problems are caused only by depression. Insomnia is the most common sleep disorder in the U.S., affecting nearly one out of every three adults at some point...
Again, the goal with a physical exam is usually to rule out a physical cause for depression. When performing the physical exam, the doctor may focus primarily on the neurological and endocrine systems. The doctor will try to identify any major health concerns that may be contributing to symptoms of clinical depression. For example, hypothyroidism -- caused by an underactive thyroid gland -- is the most common medical condition associated with depressive symptoms. Other endocrine disorders associated with depression include hyperthyroidism -- caused by an overactive thyroid -- and Cushing's disease -- a disorder of the adrenal gland.
Many central nervous system illnesses and injuries can also lead to depression. For example, depression might be associated with any of the following conditions:
Your doctor can usually tell if you have depression by asking you specific questions and doing a physical exam. Your doctor may, however, ask for lab tests to rule out other diagnoses. Your doctor will likely do blood tests to check for medical conditions that may cause depressive symptoms. He or she will use the blood tests to check for such things as anemia as well as thyroid, other hormone, and calcium and vitamin D levels.