Underarm liners are an antiperspirant alternative that does not leave stains. The term "underarm" typically refers to the outer surface of the axilla. She could not raise her arm above her waist and had underarm pain. Alum's antiperspirant and antibacterial properties contribute to its traditional use as an underarm deodorant. The xyston was used to thrust either overarm or underarm with the elbow flexed. BTX-A was later approved for the treatment of excessive underarm sweating. The use of long sleeves without leaving the underarm open would have hindered movements greatly. Surgery was required, and a visible scar was left on his right underarm. Many are grouped in clusters in different regions, as in the underarm and abdominal areas. The 19th century saw underarm bowling superseded by first roundarm and then overarm bowling. Layups can be broadly categorized into two types&colon; the underarm and the overarm. The xyston was wielded either underarm or overarm, presumably as a matter of personal preference. In some modern Western cultures, it is common for women to remove underarm hair. It shows Harvey in lingerie and sunglasses, raising her arm and exposing her natural underarm. The evolutionary significance of human underarm hair is still debated.