Girls, hi, I have such a question. My son slept badly last night and w…

Girls, hi, I have such a question. My son slept badly last night and was very fussy. And today in the daytime too, runny nose started, plus watery stool, constantly biting his hands and everything he gets in his hands, could these be teeth? I looked at the gums, they weren't swollen, there were no temperatures.