I just came out negative for covid after being positive last week but today the doctor said i had a small pneumothorax on my right lung , how long until i recover? i was told to use my albuterol pump every 4 hours and to take it easy, i have asthma?

A small pneumothorax is not rare in asthma patients. It represents air that found its way between the lungs and chest wall, usually after one of the alveolae pops. It's more a function of air trapping in lungs that are mechanically less sturdy. I cannot link it to dehydration, although one could be dehydrated at the same time. They usually self-heal in days if heavy exertion is avoided.