My cockatiel is a little over one year old. She is a Cinammon white-faced pearl, which means she is mostly white with brown pearling, primarily on her wings. She also has some more very light, sold brown coloring on her chest and abdomen. Her face and head, until recnely, have been completely white.

A few weeks ago, she started developing some pinkish coloring around her mouth, extending to the eyes, and on the head just above the eyes and beak.

I am a relatively new bird owner. I don't know if this is normal or a sign of some health and/or nutrition problem. Can someone familiar with this phenomenon please advise me?

Thank you!