As far as your question is concerned, I want to know if you are breastfeeding? mother’s feed is the best option for good immune system. Also please give more fruits and vegetables as well try to increase his sleep time. Please ask your doctor about what kind of vegetables and fruits can be given. You need to take care about infections caused by germs and insects etc. Also take care of your baby’s vaccination schedule.
Also for teething, you can ask your doctor about “Calcarea” teething tablets (German made). Don’t use these tablets without your doctor’s prescription.