Is sweat considered impure if it touches a place of impurity on someone afflicted with urinary incontinence, or seminal discharge (madhy), or menstruation, and does it render clothes impure?

Human sweat is pure without dispute, whether it belongs to a menstruating woman or not. No attention should be paid to doubts about sweat mixing with impurity. However, if it is certain that sweat has mixed with menstrual blood or another impurity, then it becomes impure and must be washed. As for the sweat of a person afflicted with incontinence, if it mixes with their impurity, it is excused and does not need to be washed according to some scholars.