Mullein in the herb Tarot represents the Four of Swords related to the wind element. Mullen is related to cough and upper respiratory tract infection symptoms, but it also means physical fatigue and a sensitive immune system due to the need to rest.
Mullen reminds us to rest when feeling tired or even often sick with colds. The body signs mean the body is protesting the need for rest. Take time to recharge. Four of Swords says: "Rest is to take a longer road," We can take a good rest for some time before you can face the next new challenge.