5 year old so has started bed wetting and 4 months of being dry

[Simneo]

Good morning all. My 5 year old little boy has been dry for the last 4 months and has started to wet the bed again. Hes seems happy a d no changes at home. His wee does smell very strong in the morning which is unusual for him. He said his wee doesn't burn or sting. And ideas or advice would be really appreciated

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Is he back in pull ups ? May be better to put him but in them