Men naturally start losing some of their testosterone when they hit their 30s or 40s. A more rapid decline in testosterone levels may indicate a problem called low testosterone (low T). Common symptoms of low T include:
- Erectile dysfunction (ED).
- Changes in sex drive.
- Decreased sperm count.
- Depression or anxiety.
- Weight gain
- Hot flashes.
Some men may also have changes in the size of their penis and testicles. Others may have breast swelling.
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