High testosterone levels in men, also known as hypergonadism, can cause a range of symptoms that can vary depending on the underlying cause and individual differences. Here are some common symptoms associated with high testosterone:

1. Increased muscle mass: High levels of testosterone can promote muscle growth and increase muscle mass.
2. Decreased body fat: Testosterone can help to reduce body fat, particularly in the abdominal area.
3. Acne: High levels of testosterone can stimulate the sebaceous glands in the skin, leading to acne breakouts.
4. Mood changes: Testosterone can affect mood and behavior, and high levels may cause mood swings, irritability, and aggressive behavior.
5. Increased sex drive: Testosterone is a key hormone in male sexual function, and high levels may lead to an increased sex drive.
6. Hair loss: High levels of testosterone can cause hair loss, especially in men who have a genetic predisposition to male pattern baldness.
7. Sleep apnea: Testosterone can contribute to sleep apnea, a condition where breathing stops and starts during sleep.

If you experience any of these symptoms, it’s important to seek medical advice for a proper evaluation and diagnosis. While high testosterone levels can be a natural part of aging in men, they can also be a sign of an underlying medical condition that requires treatment.