Help With Lettuce Plant (Pics)

Hi I have couple of lettuce plants and I noticed this stains on the lettuce that I really don't know what it is. any body can help?

well the first pic it looks a lil purple witch is normal but no the second pic.
i have had spots like that before on my lettuce and it did not seem to spread for me or ruin the lettuce, i still ate it and it was great

i'm not real sure but it looks like a viral thing or fungus maybe. did it spread? if not maybe you're good to go. otherwise, look up an organic fungicide...good luck!

No it looks like water deposits. any spot on the leaf where theres an excess storage of water browns on patches before the rest.
Looks delicious