my PN developed at the same time as i was getting numerous respiratory infections, persistant wheezing and cough and eventually asthma. I didnt know what it was for the first two years, first i thought it was an ingrown nail as just my big toes were affected then as it spread i thought it was my back causing it. I can feel an infection coming on almost immediately and the pulmonary doctor believes i can and i start right away on antibiotics, prednisone and the nebulizer every 4 hours. If i dont i will be flat on my back within 12 hours. Even with the early warning sometimes i get a persistant infection which leads to long term (5-12 weeks) constant wheezing and coughing. Even though PN and chronic bronchitis and asthma developed together i get a lot of resistance as to the connection from neurologists and epidemiologists.