Welcome to health care magic. I have gone through ur query it will be related to allergic cause. I would like to ask some question to reach nearer to the cause, _have this increase more with weather change? _has fever during cough and cold? _any breathlessness or any type sound from chest? _what is duration and frequency of these symptoms ? recurrent cough and cold are syptoms its to be hard to control. indentify allergic substance which one get his syptoms inceases , avoided it. do allergic test for air borne allergy and some food allergen .this will helpful to find out cause of syptoms. about nebulisation no any harm from continue using nebulisation . nebulisation with asthalin and budecort is helpful only when wheezing sound in chest , breathlessness. when above syptom will be present then u will be using nebulisation . ashalin have some side effect like tremor, tachycardia, hypokalemia. consult pediatrics chest specialist if any sever problems. hope I answered ur query ,any further query dont hesitate to ask me . regards