What product can be used to stop minor bleeding during a manicure?

A styptic liquid or powder is specifically designed to stop minor bleeding, making it the correct choice in this context. It typically contains ingredients that constrict blood vessels, which aids in the cessation of bleeding quickly and effectively. Styptic products are commonly used in various beauty and medical settings for situations like nicks and cuts, which can occur during nail services, especially if the skin is cut while filing or clipping nails.

The other options, while they may have their own uses in a manicure, do not serve the purpose of controlling bleeding. Lotion is generally used for moisturizing the skin, nail oil is intended to nourish the nails and surrounding skin, and cotton is typically used for cleaning or applying products but does not have any properties to halt bleeding. Thus, only the styptic liquid or powder directly addresses the need to stop minor bleeding during a manicure.