Why has DS gone from being consistently dry at night to weeing every night

[StealthyKissBeartrayal]

DS was in bed time pants up to a couple of months ago, and we had been throwing out dry pants each morning for as long as I could remember. SO we took the plunge and left him out of them, with a waterproof sheet. Again, all fine for a long time. The sheet was awful (used to make his top sheet crumple and slide) so maybe a month ago I got rid of that too.
Since Tuesday, I think he has wet the bed every night. He doesn't even realise he has done it, and tries to tell me he's spilt his water in the morning. Nothing has changed - he wees before bed and takes water to bed,but he always has done. Slightly worried this could be an indicator of something - why would he go from being dry at night for months on end to weeing every night? I'd accept the odd accident but this is more than that.

Day time hasn't really changed - maybe an accident a fortnight (probaly not as often as that) but generally reliable

bump

What a shame for DS, he must feel very demoralised.

Don't really have much advice, but my DS had the odd dry pullup on holiday in a hot country, I put it down to sweating more while asleep. Went back to wetting when we got home, which was cooler. It was a further 15 mths before he was dry at night, at 4.7yrs. A waterproof sheet can make the bed warmer, as there is reduced air flow from the mattress.

We had a fitted waterproof sheet with a towelling layer bonded to the top, this was OK with a fitted sheet on top, seemed to prevent the sliding you describe. I think it came from Boots.

Why not ask DS what he would feel happiest with, going back to bed pants, or waterproof sheet and something absorbent on the bed. Or could he do without a drink at night? He should be able to manage without a drink if he is well hydrated through the day. Has there been any big change in the amount he drinks in the run up to bedtime, or the type of drinks e.g. cola or blackcurrant which can cause some children to wet the bed, where they would stay dry if they hadn't had them.

could be a urine infection (unlikely if he's ok during the day)

could be that the holidays have disrupted his routine and he's sleeping differently

could be that he's drinking different drinks at different times and that's an issue

could be he's growing so more tired and sleeping more deeply

how old is he?

Thank you. He is 4. No changes to what he drinks, and no noticable changes to the amounts. Will definitely put a towel under the waterproof sleet - quite often it's only a small amount that has escaped. Good idea about asking him what he wants to do. I have been nervous of mentioning it much to him in case he thinks he is being told off