[Cody]

There is no way for us to determine what the lump is but it should be looked at by a vet, there is some info in this link to locate a vet in India, Locating an Avian Vet//On-Line Avian Veterinarian Help

 

[Cody]

Not necessarily a tumor, are you able to very gently touch the area to determine if it is soft or hard, do not squeeze it.
Has she ever laid eggs?

 

[Cody]

So sorry this is happening to her, yellow/green urates usually indicate a liver issue. You may find this video helpful

 

[Cody]

You can give her an electrolyte solution called Pedialyte if you can get that. Have you looked at the info in this link that pertains to India Locating an Avian Vet//On-Line Avian Veterinarian Help

 

[Cody]

That does not look good, the dark color may be blood under the skin or some sort of bruise, can you clean the droppings off of the area?

 

[Cody]

Areas that have an infection going on can feel hot. Birds can lay eggs at any time, there does not have to be a mating for a female to do so, without a physical exam the vet is exploring all possibilities for what might be causing the problem.

 

[Cody]

Egg binding is a very serious and dangerous issue, here is some additional info we have on the site Egg Binding: How to Prevent/How is it Treated? See if you can locate a wildlife rehab facility or a zoo with a vet that looks after the birds there, maybe they can help you.

 

[Cody]

Take a look at this regarding electrolyte solution Guardian Angel // Pedialyte // Pedialyte Recipe
If you do not want to do x-rays, ask the vet what he/she thinks the possible issue might be and how it can be treated? Here is some info on what the exam should include The Avian Physical Examination
Take list of questions with you and make sure you ask what the side effects of any meds that might be prescribed will be.

 

[Cody]

I am so sorry to hear this, try and take comfort in knowing that she had a happy life with you and Blueberry and she and Blueberry are now together again.
Fly high sweet Kiwi 🕊 🌹