Thanks for asking me to respond.
There are several bones in the palm and wrist joints that can be the source of pain. It depends on the exact location from where pain is arising. Inflammation of the tendons of the thumb or those attaching to the fingers (trigger fingers) are common causes of pain and swelling.
Chickenguya itself can lead to swelling of the joints but it's unnatural for it occur after an interval.
She needs anti inflammatory medicines for the time being. I cannot prescribe meds as Practo prohibits me from doing so
If the pain persists beyond a couple of weeks, it would be a good time to consult a rheumatologist who can confirm the presence or absence of serotonin negative arthritis. A couple of blood test can confirm the diagnosis.