Oh now I remember, I heard asthma is from being overly critical. But it does make sense that breathing problems could be caused by shock in the aura. This could be from a past life even.
Elder berry flower tea or cordial can help a lot. Something in the flower helps open up the air waves. I highly suggest weaning him of his prescriptions onto the elder flower tea or cordial. The cordial tastes very good, and a young by may prefer that over tea.
I have no doubt the prescriptions I was on when I was younger made me sicker.
I just read about colour healing that blue is good for asthma. I recall blue being my favorite colour when I was younger and suffering from asthma.
"Eases diseases such as asthma, chicken pox, jaundice and rheumatism. Gives qualities of idealism, devotion and understanding." -
http://charmsoflight.blogspot.com/