My girl on average, once a month has "issues" expressing her glands. It's a horrible stinky fish smell, it's absolutely terrible. For a day or two she stinks but eventually expresses them herself.
My vet would prefer me to express them myself, and she doesn't think it's worth it for me to bring her into the vets to get them expressed. (Pfftt, she just doesn't want to do it! ROFL) Although it takes her a day or maybe, *crosses fingers* hopefully not two, she gets the job done herself, so far, thank God. ROFL