Bald spot on cockatiel's head

[Peaboo]

Hello,
I am seeking some aid for a recent bald area found on my cockatiels head. She is a year and a half in age and has no other birds that occupy the same cage. I am unsure if this bald area, upon the right side of her crest (above her right eye), should be a concern. This is the first time i have seen her with this problem and I am worried that it might be some sort of skin disease or mites. I will be linking a couple of pictures to show the location. Any constructive or informative input would be very appreciated. Thank you.

 

[Noahs_Birds]

Looks fine to me, probably she just had a bit of a flap around her cage and a bit of her feathers came out
Unless there is a lump procuring out of it, or if she she begins to bald more there should be no worry

Cheers
Noah Till

 

[MonicaMc]

He's a pretty guy!

I suspect he may have bumped his head on something?