Our expert says:
Hallo Concerned mom
It sounds like winter fingers but I agree, it wasn't cold enough for this (unless the exam hall was very cold early in the mornings) It could also be inflammation of the small joints due to an underlying viral infection. You can try Nicotinamide or flush free Niacin (both vit B's) to increase circulation in her hands and feet and an anti-inflammatory like Mypaid, but if she has any symptoms like fever, red swollen joints and is generally feeling unwell, she needs to see her doctor for a full examination and possibly blood tests.
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