excessive peeing in toddler

[Sassles]

Hi,

My DS is 16 months. He has for about a week been filling nappies with pee. He has been soaking through them and through his clothes in a couple of hours. The brand of nappy we have been using for ages with no issues. I have tried super absorbant ones and gone up a size (now in 5 +!) and still soaking though. e,g, nappy changed by my mum at 3pm and at 5.30 when I picked him up he had soaked through his trousers.

There have been a few mornings where he was wet through, but this seems to happy more during the day. He does drink a fair amount, but not an excessive amount.

Has anyone experience this?

what does he drink

ie squash, juice, plain water, ribena, full fat milk?

He has full fat milk morn and night. Mainly diluting orange juice (sugar free) or water during the day.

Some breastmilk still too.

Sugar free juice makes my DD wet herself. The artificial sweetners are not good IMO.
Stick with water or diluted fresh fruit juice.

I'd take him to the doctor to rule out diabetes, to be on the safe side.