What are the symptoms of low testosterone in men

Low testosterone (hypogonadism) manifests through various physical, sexual, and psychological symptoms that develop gradually as testosterone levels decline below normal ranges (typically below 300 ng/dL). Physical symptoms include decreased muscle mass and strength despite exercise, increased body fat (particularly around the abdomen), reduced bone density, decreased energy and persistent fatigue, hot flashes or sweats, and sometimes breast tissue development (gynecomastia). Men may also notice reduced body and facial hair growth or changes in hair distribution.

Sexual symptoms are often most noticeable and concerning, including reduced libido and sexual interest, erectile dysfunction or difficulty maintaining erections, and decreased spontaneous erections (particularly reduced morning erections). Psychological and cognitive symptoms can include mood changes such as increased irritability or depression, difficulty concentrating or memory problems, reduced motivation and drive, and overall decreased sense of wellbeing. However, many of these symptoms overlap with normal aging, stress, poor sleep, depression, obesity, and other medical conditions, making self-diagnosis unreliable. If you're experiencing several of these symptoms persistently, consult a healthcare provider who can order blood tests to measure testosterone levels. Testing should occur in the morning when testosterone peaks, and typically requires two separate measurements to confirm low levels before treatment is considered. Many symptoms attributed to "low T" actually stem from correctable lifestyle factors—poor sleep, inadequate exercise, excess weight, chronic stress, or underlying health conditions—making comprehensive medical evaluation essential before assuming testosterone deficiency.