https://www.health.harvard.edu/drugs-and-medications/testosterone--what-it-does-and-doesnt-do
The Perils of Too Much Testosterone
Having too much naturally-occurring testosterone is not a common problem among men. That may surprise you given what people might consider obvious evidence of testosterone excess: road rage, fighting among fathers at Little League games and sexual promiscuity.
Part of this may be due to the difficulty defining "normal" testosterone levels and "normal" behavior. Blood levels of testosterone vary dramatically over time and even during the course of a day. In addition, what may seem like a symptom of testosterone excess (see below) may actually be unrelated to this hormone.
In fact, most of what we know about abnormally high testosterone levels in men comes from athletes who use anabolic steroids, testosterone or related hormones to increase muscle mass and athletic performance.
Problems associated with abnormally high testosterone levels in men include:
Low sperm counts, shrinking of the testicles and impotence (seems odd, doesn't it?)
Heart muscle damage and increased risk of heart attack
Prostate enlargement with difficulty urinating
Liver disease
Acne
Fluid retention with swelling of the legs and feet
Weight gain, perhaps related in part to increased appetite
High blood pressure and cholesterol
Insomnia
Headaches
Increased muscle mass
Increased risk of blood clots
Stunted growth in adolescents
Uncharacteristically aggressive behavior (although not well studied or clearly proven)
Mood swings, euphoria, irritability, impaired judgment, delusions