could be rust, a fungal infection or the wound response to being eaten/sucked by aphids. spray with a fungicide and hopefully it will recover. I'd remove any damaged leaves if there are only a few.

I'll do that Sbg...It was in a sunny site and it didnt like it, i was moving it when i noticed this...Thank you for your help..:>)

I have the same thing on 'Marmalade' in full shade. I'm off to spray mine.

I think it might also be a reaction to strong sunlight - the paler a Heuchera the more shade it needs. Yours is pretty pale, so lots of shade. As it was stressed being in full sun that may have allowed a fungal infection to take hold.

I think you are right Kildermorie...thank you..I put it in a pot with some nice compost after i trimmed off the bad leaves and sprayed it...I placed it in a more suitable spot........we'll wait and see...:>)