Hi..
Welcome to HEALTHCARE MAGIC..
So sorry to hear about your problem and will try my level best to resolve it..
As per your complain if your baby has sensitive mouth along with
fever then it can be probably due to
teething while can also be due to viral infection..
Giving
tylenol is appropriate as it will help in reducing fever as well as pain..
But for confirmation of the exact cause you need to get him evaluated and a thorough clinical evaluation and investigations like
blood test [ if needed] can help in diagnosis and treatment can be done accordingly..
As of now you can continue giving him tylenol and along with it do cool compresses over the gums..
You can also give him cool and bland foods..
Give him plenty of fluids and sufficient rest..
Any further questions are welcome..
Regards..