

Allergies can change over time, and also can become more severe with repeated exposure. You can consult with an allergy specialist to get tested and some advice, but there are a few suggestions here already that should help alleviate symptoms. The biggest one is probably to change and wash your sheets frequently (like at least weekly). And use a wash cycle with hot water.
There are lots of options for allergy medication, too. I have really bad pollen allergies, but I’ve been using Nasacort daily for many years now, and they hardly bother me at all except a little at peak season.
If you think you can manage it, regularly bathing your cat will reduce the amount of dander in his coat. At the very least, try to brush him at least a few times a week with a de-shedding brush, in a different room. I find the Furminator brand brushes work really well on most cat coats.




Thing that worked for us (may or may not work for you): put packing tape or (better) double-sided tape over the area of the couch your cat scratches. Put an approved scratcher they like to use nearby. Ideally right next to the area they’ve been scratching. You can reinforce even stronger if you give treats when they use the correct scratcher.