Hello my son is 8 months old I can see his jaw is getting stronger do teething cause runny nose and cough he is plugging. His ear frequently

A. so ye sits common so now. teeth eruption can make baby cranky as it s painful . Drooling saliva , hard gums , and a cranky baby are signs. Can massage baby gums well for ease. Can use teether silicon or wooden for baby . Maintain hygeine of teether . Can be given vitamin d3 from birth till 1 year of age 1 ml 400 IU or 0.5 ml if 800 IU daily .