I am not aware of asthma being a sign of MS. Many people develop asthma or exercise induced asthma and do not have MS. My PCP and his ex-PA both have asthma but do not have MS.

My daughter was born with asthma and is now 20 years old, but rarely needs medication anylonger. My son was diagnosed with exercise induced asthma when he was in 5th grade. He is now 22 and no longer has a problem with exercise induced asthma. I have never had asthma.