My husband sweats at the lower legs at night he also started having erection problems and he started feeling tired most time.

See answer: Night sweats by themselves are common and often the cause is not serious, readily apparent, or as simple as high bedroom temperature, too many blankets, or dietary indiscretions before bedtime. However, in conjunction with other symptoms such as ED and fatigue, a hormone abnormality such as low testosterone, thyroid dysfunction, or systemic illness is more likely. Recommend full evaluation by MD.