Symptoms of a lack of testosterone are not clear-cut and may be misinterpreted in various disease constellations. The most common symptoms are fatigue, burnout, depression, sleep disturbance, fat storage on the stomach, joint and muscle aches combined with a decrease in their mass, problems in sexual life. If your blood testosterone level correlates with the range of symptoms associated with your lack of it, you may need to start hormone therapy individually. After applying it, you can get an improvement in well-being, weight loss, a change of figure to a more masculine and flexible, better sleep quality, as well as increased libido. There are men who, despite low testosterone, do not feel any changes in the body. They usually have so-called temporary decreases in testosterone, often caused by stress, which is transient and does not require treatment. After some time, their hormone levels return to normal by themselves.