OK so I took Manny to the vet today and they said it's an infection in his mouth

They gave me antibiotics and he should be all better in less then three weeks

I have just cleaned out his enclosure and all the hides and bowls, given him his first dose of antibiotics and will leave him to rest and get better

I've been able to keep the heat up to 28-30 degrees over night by putting his previous smaller heat mat across the back of the warm side

Hopefully I will be posting again very soon with a nice picture of him looking much better and with his tongue back in action

Than you for all your kind words and advice

I really do love this site!