Brief Answer:
Kindly send details of her symptoms

Detailed Answer:
Hello and welcome to Ask A Doctor service.

I have reviewed your query and here is my advice.

It seems quite swollen and ligament injury comes to my mind.

Does she have other symptoms like avoiding movement of the hand, pain in the area, any injury etc? Any history of allergies?

If there is pain, then a visit to orthopedic surgeon is needed and he may suggest wrist brace to avoid movements even during sleep.

Hope this helps. Let me know if I can assist you further.
Dr Vaishalee

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