My son is a few days off 7 months and suddenly we've gone back up to what appears to be 4 naps.
He has 3 naps during the day ranging from 1 - 2 hours in length. We have a routine, he goes down in his cot and puts himself to sleep nicely. Basically no fuss.
Bed time used to be the same but this last week nope. He sleeps for about 40 minutes then he's up again and will NOT go back to sleep. He screams until he's sick, the toddler has woken up and the neighbours are banging on the wall. He won't go to bed for another 3 hours.
He's only sleeping about 9 hours at night because of the 4 naps.
I've tried keeping him awake longer but he will fall asleep sitting up qnd turns into an absolute gremlin.