I have (at least partly) control over when this happens for me. If one of my nostrils is clogged (without any pathological reason) and I focus on it, I can open

I have (at least partly) control over when this happens for me. If one of my nostrils is clogged (without any pathological reason) and I focus on it, I can open up my airways again quite quickly. Sometimes I even hear a squeeky sound as the tissue inside the nose contracts.