Over how long?
David Weaver
I'm 44. I've noticed over the last 25 years, my sense of smell has slowly gotten less acute, and quite often, I can't smell what my wife smells (but she also has a seemingly bionic nose for some reason).
The kids smell more than I do, too, and I haven't had much exposure to solvents, etc.
The sense of smell is still there, but subtle things like flowers where the smell isn't particularly sharp, I have to get a whole lot closer to be able to notice them.
(this is much different than loss of smell like covid - like total loss by some accounts, or inability to smell or use smell or recognize smells (dementia)). I recall seeing before that prolonged low mood can result in loss of smell, along with neurological conditions (alzheimers, dementia, parkinson's...).
If it's abrupt, it's probably worth seeing your pdoc or ENT.