Spearmint is steam distilled from the flowering tops of the herb. The scent is refreshing and minty. It is a comforting scent that can be relaxing and help to relieve mental fatigue. It is slightly antiseptic and may be useful for minor skin eruptions. The properties of spearmint oil resemble those of peppermint but with a less powerful effect. It has been used for asthma, bronchitis, sinusitis, colic, flatulence, nausea, vomiting, colds, fatigue, headache, migraine, nervous strain, and stress.