Low libido (low sex drive) is a health problem that affects both men and women. It can manifest temporarily, for prolonged periods of time, or recurrently, depending on the cause. Amongst other factors, changes in a person’s hormone levels, may have a direct effect on a person’s sex drive.
In addition, there are a range of physical problems that can cause low libido. Medical conditions or diseases can greatly affect a person’s desire for sex. Sexual response doesn’t necessarily flow in a linear pattern from sexual desire, to arousal, to orgasm. There is no ideal libido level that you need to strive for. The most important thing to think about is whether it bothers you or causes distress/relationship problems.