In general, medical conditions affect cosmetic surgery to the extent of their severity.First and foremost, anyone with any significant medical condition, regardless of age, needs a visit with a medical doctor for clearance and medication adjustment prior to an elective procedure like cosmetic surgery. In elderly patients, a clearance would be necessary regardless of medical conditions.In regards specifically to asthma, if it is mild and intermittent, that it most likely would not affect things. If it is moderate or severe, then it might affect the approach to the procedure, the degree of invasiveness, the time allotment, etc. In severe cases it may even preclude any surgery. As well, if you are on steroids, this may affect wound healing. This is why it is important to choose a plastic surgeon who is judicious and places safety above all things.I hope this helpsBest of luck!Dr. SubbioBoard-Certified Plastic SurgeonNewtown Square/Philadelphia, PA