I would advise that you take your cockatiels to an avian vet as the lumps could be anything really.

The most common thing I can think of right now is the scaly face mite that burrows into the skin around the beak causing scaly growths. But I am not qualified to give a diagnosis.

Fingers crossed for you and your cockatiels

__________________

"Because I be what I be. I would tell you what you want to know if I could, mum, but I be a cat and no cat anywhere ever gave anyone a straight answer."

~The Paw Relations Blog~
~Nikki~
Owned by :-
Izzy - Congo African Grey
Missy - Galah Cockatoo
Shen - Black Labrador
Thomas, Charlie and Lola - Cats
Honey and Mustard - Rabbits
Gill and Rocket - Goldfish
~ Rest in Peace ~
Deedee - Timneh Grey 31.05.01 - 22.06.06