My 7 yr old cat is pulling his hair out?

Take the cat to the vet. It may be fleas, but it could be other things, too. Food allergies can have a sudden onset after years of feeding. It could also be a thyroid issue. There are many things that can cause hair pulling. Your vet can help you sort it out.

yes, it is a sign of nervousness. Get him to the vet to see what's going on with him, and maybe get him some meds to calm him down so he doesn't end up with skin that looks like it has been half eaten. I saw a cat once when i was younger do this so bad that he had little patches of scabs all over his skin from pulling out his hair. We caught the cat, as it was a stray and took him to the vet. The vet gave him a milk tranq and gave us some creme to put on the wounds, he healed up nicely but was never a friendly cat.

Please see your vet to determine the cause of this. Sounds like a skin irritation - either from fleas or another source that your vet will have to identify. Your cat may need medication. Do you give your cat monthly flea/heartworm protection - something like Advantage or Revolution? Even though he lives indoors, you can bring fleas inside - so he needs to be on a flea prevention product. Good luck!

He could either have fleas which were brought in by humans or he can have a skin disorder. Skin problems are really common this time of year, sometimes they are caused by allergic reactions to food.