High testosterone levels can be associated with a wide range of symptoms, including excessive body hair and acne, mood swings and aggression, low sperm count or infertility, hypertension (high blood pressure), or heart and liver problems.
It is unusual for testosterone levels to be naturally high. Abnormally high testosterone levels are often linked to anabolic steroid use.
Increased testosterone levels in males can indicate testicular or adrenal gland issues, which can be serious, and are often reviewed further to clarify the cause.
In women, increased testosterone levels can indicate polycystic ovary syndrome (PCOS) or an ovarian or adrenal gland problem, and are often reviewed further to clarify the cause.
High testosterone levels may be expected when testosterone supplements are being used, but interpretation can be complex because multiple factors can influence testosterone levels. A high result is commonly shared with the clinician who requested the blood test or a GP.