needles

So I've been going to a Physio dude for a week or so now to try and sort out what he reckons is a dose of bursitis on my achilles heel. Basically it means that a bursa (soft fluid sac) hardens to the consistency of a marble and makes stretching difficult. So its near impossible to stretch my calf muscles.

Anyhoo... he's been doing ultrasound treatment, which seems cool, in that it doesn't hurt, but recently he's starting sticking needles in it.
And I don't like needles... but I'll tolerate it a) because it might help. but mostly b) because I can't see it.