Urgent Budgie got red skin, itching & feathers loss issue

[Hadoop]

Hi! I am new to this forum. Today I just woke up to see my budgie loss most of her feathers over night, and she is very itchy atm. I am attaching a picture of her where you can see, she even got red skin showing. Further I woke up to see her in blood, might i add I cover her completely and securely at night for anything external factors to harm her.
Also the night before she was totally fine and i am unsure what just happened over night. I am very anxious and saddened to see her in much pain. Additionally since her skin is irritated, she keeps scratching and picking more of her feathers and i dont know how to stop her from doing that?

also i gave her corn the other day. Besides that I had an addition of cockatiel to my little family.Thats the only new that happened yesterday other than that everything is as per normal.

 

[Mizzely]

Is the cockatiel housed with the budgie?

It's possible something spooked her? Maybe got caught on a toy or perch somehow?

 

[Hadoop]

Is the cockatiel housed with the budgie?

It's possible something spooked her? Maybe got caught on a toy or perch somehow?

No the cockatiels are housed separately. No, not really there isn’t any toy or perches that could harm her like that, i have safe proofed them already.

 

[Hadoop]

Hi, any recommendations for my pet? What measures should I take? I took her to the vet and he wrote an anti allergy syrup and a spray. Besides that my budgie is losing more of her feathers which is now spreading up to her hair

 

[Pixiebeak]

I would think this is linked to an internal health issue, kidney, ovaries would be my first guess.
Allergy would never even be something I would consider it is beyond rare .
Was this an avian veterinarian????
How do poops look?

 

[Lady Jane]

Was that an avian vet? I agree this could be something else. Is this budgie fairly new in your home? I would look into a feather loss disease.