"I am worried because he is urinating less than usual. I am afraid of a urinary infection at the same time as teething."

It is common for children to experience increased saliva production during teething, and this is usually not cause for concern. However, if your child is urinating less than usual and has developed a fever, it is important to monitor their overall well-being closely. Make sure they are still drinking and eating, and changing their diapers regularly. If their symptoms worsen or if you have any other concerns, it may be a good idea to consult a healthcare professional for further advice.