Spearmint is similar to peppermint, except that it has a slightly sweeter aroma and has only trace amounts of menthol, making it less harsh on the skin. Thus spearmint is preferable over peppermint for use on children with digestive problems such as nausea or diarrhea. Some have found spearmint effective in preventing hair loss. Inhaling the aroma has a decongesting effect on sinuses. Most people will find it relaxing and soothing, mentally.