The signs and symptoms of Low T in men may be difficult to tell from the changes that occur with normal aging, or may be assumed to be caused by other medical conditions. So if you have symptoms of Low T, talk to your doctor and ask if you should have a blood test.
If you have diabetes, ask your doctor if you should be tested for Low T. The Endocrine Society recommends that all men with type 2 diabetes have their testosterone levels checked. Patients who have been diagnosed with Type 2 diabetes have an increased chance of also having Low T.