Hi Ellysia, I don't think it's due to teething. He already has 2 small bottom teeth. The top 2 are not erupting yet. When his bottom 2 teeth was starting to erupt, he would sleep badly and would wake up crying, even during his naps. But he doesn't wake up crying these nights. He would just wake up, flip around, roll over, then talk to himself or make sounds to let us know he is awake... initially, my mom suspected teething, but no improvement after we appyl teething gel. when his bottom 2 were erupting, he would refuse to go back to sleep even though we rock him/pat him. He would keep crying. After we apply gel, then he will quieten down, then sleep. but now, there's no crying leh.... also gel doesn't help. But he does fall back to sleep rather quickly. in 5 minutes. It's just that for us adults, waking up every 2 hours after 1 or 2am, is very tiring.