My baby is turning 9 months and he cries badly and wakes up at least 6-9 times in night from the last 20 days. Earlier the frequency was 2-3 times only. He does not calm down even with feed, when we wakes him up then he looks fine. We need to struggle to make him asleep every time he wakes up. I don't think so he is colic.

Hi, Probably because he is in his aggressive developmental phase, his sleeping pattern is getting disturbed. I have read that during this time, the baby is developing at a very fast phase mentally that his sleeping pattern gets disturbed. Like he is learning so many new things, picking up words, teething, learning to crawl, introduced to food, so many things are happening with him all at the same time and it does take a toll on him and sleep is the one through which we get a hint of it as baby himself cannot tell you as what different is going on. It is just a phase and it will pass and he will form a regular sleeping schedule like yours. All you can do now is, since he must be taking solids as well is, that feed him full before his sleep time. When babies are full then babies sleep well. Sometimes, babies wake because they want breast feed and it is just for comfort feeding, just to have your touch and feel you around.