To help strengthen the muscles around the jaw and neck, which in turn will tighten up the skin under the chin, all you need is a tennis ball. That's right, a single tennis ball (with a pack of ...

According to Healthline, there are a range of exercises that can "strengthen and tone the muscles and skin in the area of your double chin" - and most can be done with no equiptment at all.

That’s because fat deposits under the chin can be “worse in ... Often, they claim that “maintaining those muscles can help reduce the appearance of sagging skin,” Khoury said.