A family doctor/pediatrician should formulate a treatment plan, including allergy testing, with your son's involvement. Daily inhalers should be distinguished from "short-acting" (or "as-needed") inhalers. Oral medications should be discussed, too. Junior should keep "short-acting" inhaler on person. Also, discuss when ER visit is needed--and "peak flow". Emphasize the need to see a doctor when he suspects bronchial inspection/bad cough.
You should know that asthma can kill. Go to an allergist and follow instructions religiously. Educate yourself about asthma and its triggers. Be prepared if he has an attack.
Make sure he keeps his rescue inhaler with him at all times. Make sure he understands his asthma "triggers". It's a good idea for the adults in the family to learn CPR. Remember he is 10 and doesn't want to worry about this stuff so it will take gentle reinforcement.
Asthmas link allergies: fur, dust, mold, pollen. Change bedding, no stuffed animals, cigarette smoking, air ducts cleaned, filters changed. Air conditioning instead of opening windows, get HEPA filter vacuum cleaner.
The baby should have an inhaler always ready in his pocket. Whenever he feels suffociation, he should intake breathing through the inhaler. Pouring of one drop each of the pure mustard oil in each of the two nostrils daily helps in this diseases. But this is a temporary solution. Better consult a specialist doctor.