Is this a disease?

[NatalieS]

Originally Posted by D’Elena

It’s not snails. They are in my dinning room on my walls. But good thought. I really think it’s a disease or fungus.heres another photo from July. Attachment 168438

The roundness of the pale areas kind of make me think sucking pest? Thrips maybe? Thrips damage can look quite varied sometimes. Have you seen any little black flies around? They would be even smaller than fruit flies or fungus gnats - sometimes very hard to spot unless you disturb them. And then the larvae who crawl around damaging your leaves are very hard to see.

Just a guess though.