Paraffin wax and high blood pressure?

Hi geeks,
Just had a lady come in who wants to have a paraffin wax pedicure, She said she has high blood pressure but is on medication and its under control. She informed me that she has been refused paraffin wax treatments at two other salons because of the high blood pressure. Iv not long qualified in manicure and pedicure and i really don't remember being taught that hypertension was a contraindication for paraffin wax.
Can anyone help
Thanks Iza