Does a naturally declining testosterone level cause the signs and symptoms of aging?
Some men have a lower than normal testosterone level without signs or symptoms. For others, low testosterone may cause: • Changes in sexual function. This may include reduced sexual desire, fewer spontaneous erections — such as during sleep — and infertility. • Changes in sleep patterns. Sometimes low testosterone causes insomnia or other sleep disturbances. • Physical changes. Various physical changes are possible, including increased body fat, reduced muscle bulk and strength, and decreased bone density. Swollen or tender breasts (gynecomastia) and hair loss are possible. You may experience hot flashes and have less energy than you used to. • Emotional changes. Low testosterone may contribute to a decrease in motivation or self-confidence. You may feel sad or depressed, or have trouble concentrating or remembering things. It’s important to note that some of these signs and symptoms are a normal part of aging. Others can be caused by various underlying factors, including medication si
