You mentioned cedar allergies. Yes, it can become a thing. My dad was a carpenter for 50+ years. During that time a lot of houses were sided with cedar lap siding. He never had a problem with it until he did. It really started giving him trouble after a long time (decades) of cutting it. He would have what seemed to be spring time allergies any time he cut a lot of it. Congestion, runny nose, sneezing, watery eyes, stopped up nose etc. A dust mask pretty much solved the problem with the exception of occasional bouts of sneezing and some sniffles. He finally stopped working with it though.