Cough allergy in baby

Does anyone experienced Cough Allergy in baby? My lo is 9 months old and lagi siya sinusumpong ng dry cough every morning or minsan middle of the night saka tuwing hapon. So sa isang araw 2 to 3 times siya kung sumumpong. Nakakaworry lang kapag nasumpong dinadalahig siya pero less than an hour lang tumatagal and pagkatapos wala na, my lo looks ok na parang wala lang and wala naman ako marinig na wheezing sound or plema sa breathing nya. Please share yours po mga moms kung may same situation and ano po ginawa ninyong prevention? Thanks..