I'm trying to work out why the heel she's started complaining over the last couple of weeks of being "itchy"
We already use products that are anti allergy there's literally nothing to react to 
She is mainly moaning about the tights...her sisters old pure cotton non reactive, washed in ecover tights that she's worn under her trousers ( classrooms cold so she needs to layer up) for ages now.
No new products, nothing. 
Negative covid test recently too and it pre dates the test.