Hi first time bird mum and borken blood feather

[RohanL]

Hi guys Picasso my cockatiel got a scare and lost a feather I saw it had a tiny bit of blood on it, he's squawks likes he's in pain occasionally, not often. He's about 7 months old and going through his first molt. He's singing, giving kisses, cuddles talking and playing. He's all white expect the on his wings so I'd notice any bleeding. Today I was taking a video of him while he was preening and noticed a very light red stain on his wing. It's not bleeding. Will he heal on his own and how long will it take?
I took a picture of the feather and his wing. Sorry if I've posted this in the wrong spot I'm new and just learning my way around the site.