There's always a strange smell in my throat.

This phenomenon may be caused by your usual gastrointestinal indigestion, or because of stomach fire, acid reflux, sinusitis nasal secretions caused by reflux to the nasopharynx are possible. No timely treatment will lead to the appearance of this odor, you should go to the hospital digestive department or ear, nose and throat examination as soon as possible, and then symptomatic treatment.