@DrDara, thank you so much Dr, I will do as u advise.

Sometimes, infections can cause bad breath. If your toddler has an infection at the back of his throat, such as tonsillitis, this can make his breath smell. Other symptoms of tonsillitis include a sore throat and coughing. Your toddler’s bad breath will disappear when the infection clears up. It’s also possible that the smelly breath is because your little one has a blockage in his nose It is possible medical conditions like GERD (Gastroesophageal Reflux Disease) – When stomach acids regurgitate into the throat, it can cause an acidic scent and Allergy or cold – Extra mucus translates to extra opportunities for bacteria to grow, making baby’s breath smell bad.If your baby has persistent bad breath, take him for a check-up at the paediatric dental specialist. He/She should be able to advise you about what may be causing the problem.