It is absolutely normal for a lutino cockatiel to have a bald spot. The veterinarian was obviously not an avian vet. Don't worry about it, as it doesn't bother her. If the time comes to mate her, don't use a lutino male bird.

she might be molting.

My lutino cockateil which suddenly started losing her head features.I took her to the vet he said to apply an ointment on her head. Named BACTROBAN. Two days passed but I see nnosign of improvements .. I am really scared..please tell will it become normal and can I do something to help her,