Hello Mr  Suhail 
You are an asthmatic patient from child hood and now having severe hairs fall with weak bone . 
In my opinion you were taking corticosteroid tablets for asthma , however, you didn't mention in your query.
Because those who use steroid tablets they develop weakness in bones and also hairs fall , so stop these medicine at once .
When such case of asthma visit my clinic I prescribe my patient to take montelukast+ bambuterol tablet once or twice in day depending on the condition and severity of symptoms .
Pollen , fine dusting powder, mite , hay fodder, sudden fall and rise of temperature, pests (cockroaches ) , molds , 
smoking ( smokes ) are certain predisposing factors causing asthma , so if possible avoid .
Hope this will help you.