Pleazzze help. What is this?

Hi there.
I'm here again with another problem. I'm in 48th day of flowering and this lil one starting to have some disturbing sign of peace...all other ladies looks fine but this one it's some different. I don't know what is it, mold or burn or .... is it a problem and if how to fix it? Really thanks for any help, very appreciated THX

Looks like burn from a light to me, however under ? IDK...
Something [someone] screwed up 7-10 days ago...
What happened then? Tell us what you did....

looks like that bit rested on light for a while or something

If it is crispy it is a burn. If it is still moist pluck a bit of it off and see if there is mold in there. If it is the latter I'd just dissect it off bit check the stem when you harvest it and see if it if there are signs of botritys inside.

Your plant took a shit from the side of her ass and forgot to wipe. That's from the heat lamp. A light beam must be hitting that spot hard. SC might also be correct.

thanks guys. It's 20 cm above the light because other plants are not that tall as this one. Other plants are like 40-50 cm above the light. The light is air cooled so it should be fine or not? Only this plant started to do this. It is not crispy when I touching it, but sticky as shi.. I was just scared if it is not a mold or something similar. I'm not a mold master I don't know what types of mold are or anything about a plant mold. This is my first grow, lil scared.

Can u specify closer what is the sign of botritys. Sounds anything but not good for me. Thanks

Is it squishy? Does it smell different?
If you pull at it lightly and it comes off it's most likely mold

It was mold, I cut it off to save at least something. Thanks everybody.

Worst case scenario, bud rot... whats your humidity like? Try getting it as low as possible even at night.. perhaps a de-humidifyer at night and exhaust off.

yeah I think is was exactly the bud rot not mold. Why is it worst then mold please explain. Humidity 40-50 at day, at night lil higher 50-60. Just 5 days and killing them. I'll post pictures then. My first grow, I've done everything I know to do. But plants looks quite small, like 60 cm. Is it criticical kush from barnyes.