Hi, I'm on my third round of EC for breast cancer and doing ok at the moment. I'm having the cold cap and managing to hold on to some of my hair, although I am experiencing really bad painful jaw ache this time round. I've had it a little previously but nothing like this, Its really quite bad. I wondered if anyone else who'd tried the cold cap had also suffered with jaw ache? It isn't a problem that the hospital have really mentioned.