Hormonal factors may play a role in erection problems (erectile dysfunction). Men who produce low levels of the hormone testosterone (a condition known as hypogonadism) may have decreased sexual desire. A blood test is usually done if your doctor suspects this problem. However, few men with erection problems have low testosterone production.¹

Producing high levels of the hormone prolactin (hyperprolactemia) also may be a factor. High levels of prolactin interfere with testosterone production, resulting in a form of hypogonadism.

Medications are available to treat low testosterone production and excess prolactin production.