My boyfriends health

[my_luv143]

My boyfriend has experienced a lot of chest problems he says that his lungs will hurt as if someone stabbed him and there will be occasion where his breathes is wheezed as if he were having an asthma attack hes very sensitive to smoke
Another problem is his legs give out here and there he can't run far otherwise he starts to limp and sometimes we will walk then all of a sudden he just kinda trips and catches himself which usually means his knee locks up..his father has leg problems too can this be hereditary? Please answer im really worried about his health and im
Not sure what to do other doctors always say nothing is wrong but maybe there is something deeper to this please help me ):

[remar]

Most times a Dr will not answer unless you post your question in the Drs forum. I'll try to help you if I can though. Your boyfriend may have asthma. Has he ever been check for this? Another thing could be a problem with a heart valve. MVP for short. My daughter and one of my nephews have this and they have the same symptoms as your boyfriend. The stabbing chest pain, trouble breathing and weakness. I of course can not say either of these are the problem. He will have to see a Dr and have tests done.

[my_luv143]

Plz be a doctor that answer