(Concern) Rhinitis

My two sons have rhinitis.

It doesn't seem to be seasonal allergies, and it's not very severe, but my nose is constantly blocked.

I don't do nasal irrigation every day, but I do it occasionally when I feel uncomfortable, and my nose gets blocked, which is bothersome. It also affects my concentration while studying, I think. My husband and I don't have rhinitis, but since the kids do, it worries me. Is there anything that is good for nasal congestion?