omg what is this on my sister leg

Don't pop it, let it burst on it's own!!!

A pus filled blister

Great camera BTW is it a phone?
It looks like a blister that's filled with pus. The area doesn't exactly look red and inflamed but you still could wipe clean with cotton wool and antibacterial solution then leave it to dry out & monitor.

Spider eggs.

Pus?

😷 did she get burned or something??

Looks like a burn

Burn? Pus?

Bandaid time

A baby