@yorlik, I have no medical training or background but can tell you I don't particularly like wearing a face mask but do it anyway out of respect to others who fear being infected by COVID-19. I wear cloth masks which are much easier to breath through. I had a K95 mask and got rid of it right away because it was harder to breath with it on. I understand if a person already has a high blood pressure problem and taking medication that could probably trigger more problems breathing. Here's some study information on the subject but it's from 2005.

Effects of wearing N95 and surgical facemasks on heart rate, thermal stress and subjective sensations:
-- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7087880/

What type of mask do you wear?