Yes it hurts! But the fibro spots in my neck and upper back/shoulders hurt hella more than this pillow (I have the “C”), and for only $11. I’m used to pain (duh), and I use this plastic “bed of nails” while watching TV with my cat at my feet. For effectiveness and cost: A+ *Now not currently available on Amazon, but this one and this one are similar.
*All research and opinions are my own. I was not given this product; it was purchases out of utter desperation.