Can a cat have nasal congestion due to allergies??

My cat is having minor congestion issues and minor watery eyes. He is not sneezing but i can hear the congestion in his breathing. My main suspicion would be that he has feline herpes and goes through phases of minor upper resp. episodes. However i ask about allergies because he is not sneezing and does not have full blown symptoms. It really does seem like allergies the way humans would have them, I also wonder because I had an animal communicator work with him and she picked up on the congestion and said it could be allergies. So if it is possible thats its being caused by allergies what can i do about it? Also I would like to try him on some lysine supplement (in case its herpes related) but would lysine help if its allergies?

Steam from a shower can help his congestion. Lysine for herpes... have only experienced allergies as skin

disorders shedding continuous scratching.  It could be from something more serious if it's been a few days best to get it checked only your Vet can diagnose allergies.

I am going to try out some lysine and see if it makes a difference. If not then ill know it may be something else, and get him checked out for other causes.

It COULD be seasonal allergies, just like with humans, however, I would suspect he would be sneezing, since sneezing and congestion usually go hand in hand with allergies...at least they do with mine.

With cat allergies, people usually give them Zyrtec, and your Vet could tell you how much.  I'm guessing it's be the weight of your cat.  But no need to give it if it's not allergies.  And if it's herpes and he's having a flare-up, the L-Lysine might not be enough to knock it out right now.  You may need to see a Vet if it doesn't clear up.