Halak without ubo at sipon

Hi Mommies! My 3 month old baby has halak. Pero nag tataka ako kasi wala naman sya ubo or sipon, parang since newborn sya. May nabasa po ksi ako na article na pag CS baby is may halak pa talaga, how true is this po? Na hospitalize napo kasi sya nung 2 months, and normal naman xray kaya worried ako why may halak padin.