5 month baby not sleeping

[nevetsnosnas]

From the age of 5 weeks my baby boy slept through the night from 9pn to approx 7.30am most nights.
Over the past few weeks he has been waking up 2-3 times a night. When i say waking, he is crying but when I go into his room his eyes are closed and he is tossing and turning. I have tried to just pacify and also have given a feed on some occasions. Is it a growth spurt, is it he wants food, or could it be teething?
I am at a loss and just want to try and get him back into his perfect routine

[redcrx]

he will settle eventually, my 2 both started doing that at about the same age which conicided with both teething and a growth spurt.

It will also happen when they are ill. It can take a few weeks to get back into a routine each time. My daughter had the winter vomitting bug (shes 10 months) 4 weeks ago and is still not sleeping through as she was before.