LindaH,
l have used one of these ‘type’ of machines - and have felt the benefit. lt works a bit like reflexology - tapping away at your feet.
Amazon have one - Circulation Maxx Blood Booster - with infra-red option/tens. lt is by Bio-Energiser and is £56 - So quite reasonable - there are 81 reviews to read through - and some by MS sufferers.