What's the good herbal medicine for Ashma

what is the good herbal medication for asthma ?
there is no proved to be effective to treat asthma , and it may flare it up because of patient high sensitivty , so we advise against herbal medications to treat such a medical condition 
what is the treatment options for asthma ?
1. bronchdilators  beta agonists such as salbitamol
2. cortisone ( orally or inhalers ) 
3. thyophiline 
4. Montelukast
- many medications are used to treat asthma , your doctor will address for you a medication for long term and short term treatments 
- in case of serious chest infections , doctor may prescribe more heavy antibiotics such as marcloids and doxycyline 
what is the causes of asthma ?
asthma is an autoimmune disease that doesnt have a clear cause till now , but its believed that there is soem factors may lead to it such as :
- genatic causes 
- enviromental causes 
what are the needed tests ?
physical examnation by doctor  and blood and blood chemistry tests and  chest X-ray and  lung fucntion test