Hi, strange or bad smell can be seen in certain conditions and it is termed as Parosmia (abhorrent odor
perception). It is usually associated with rhinosinusitis, head trauma, viral infection, or oral problems. It
frequently disappears with successful treatment of the above mentioned conditions. Apart from treatment of the
cause or in conditions wherein the cause remains unknown, in such conditions Anti seizure or anti epileptic
medication like clonazepam against prescription is sometimes helpful esp. in persistent cases. I suggest you
to consult physician to rule out the cause. Take care and regards.