Dear parent, By the description it seems teething problem. But he may have cold as well because you had it. While teething teeth push from inside gums. They are very sharp. This usually causes gum swelling, and may lead to fever as well. Its very painful condition. But paracetamol three times is sufficient to alleviate pain and swelling. Give him carrots, cucumber, apple large pieces, so that he can chew on them. this will give him relief from irritation. Be watch full that he does not bite a big piece and choke on it. This phase will pass soon.