try using Flonase nasal spray after you swim.
Actually, I corresponded with my primary care doc via a patient portal about this symptom and he just prescribed Flonase for me (I know it’s OTC but it was just to get me started I guess). He told me to just use it daily. It’s a good thing I did correspond with him. I mentioned that I also currently take a Claratin daily and wondered if maybe Claratin-D might resolve the problem. He informed me that pseudoephedrine (Claratin-D) can cause, or worsen urine retention in guys with BPH (which I’m also in treatment for).
Claratin with the "D" can also raise blood pressure.
Claratin with the "D" can also raise blood pressure.