M.W.
My son didn't get his first tooth until 15 mon. then he only got one. he got 5 more at 18 mon. then nothing until 23 mon and he got 10 in 2 weeks-it wasn't pretty!! He would have swollen gums and I could see the white bumps way before any teeth actually erupted. He would have more discomfort symptoms before, usually by the time I saw an actual tooth, he was acting normal and I finally had an explaination for his monster-like behavior of the previous few days. I highly recommend Teething tablets, my son loved them and I could see the difference in his behavior right away. you can get them at any drug store.