Zingiber officinale

May irritate sensitive skin and mildly phototoxic. Always dilute well.
Warfarin : may cause increase in its effectiveness, possibly causing uncontrolled bleeding

In a vaporiser/burner:
Winter ailments such as colds, sore throats, sinusitis, runny noses and irritating coughs. It can relieve appetite loss in convalescence, digestive ailments, nausea, morning sickness and travel sickness. It's also thought to stimulate memory and have aphrodisiac properties.
Added to hot water:
A warming footbath to improve circulation.
Massage:
Eases muscular aches, joint pains, back pain, cramps and cellulite.