Drugs, including chemotherapeutic agents
Zinc deficiency
Oral infections
Upper respiratory infections (including COVID-19)
Diabetes
Stroke involving the pons, thalamus, and midbrain
Xerostomia (possibly secondary to Sjogren's)
Intrinsic taste bud dysfunction
Hypothyroidism
GERD
Pregnancy
Dysgeusia
Drugs, including chemotherapeutic agents
Dysphonia
Zinc deficiency
Ergotism
Oral infections
Priapism
Upper respiratory infections 