I tried two dry needling sessions to see if that would give me some relief, and it helped somewhat with the tightness but the relief I did get only lasted a day, and it didn't help at all with the pain. So, my physical therapist and I decided that continuing with dry needling wouldn't help since the relief wasn't long lasting.
To me dry needling wasn't painful, it was really uncomfortable. After the dry needling sessions I felt extremely sore for the rest of the day. The soreness felt like I did some really heavy leg lifts. This is the best way I can describe it. It didn't make my pain worse, and putting some ice on it helped. For the procedure a needle, similar to needles used in acupuncture are inserted into trigger points one at a time. The needle is then moved around to try and get a "twitch" response, which is supposed to help relax the muscle. The "twitch" was the most uncomfortable part for me. I also did have some bruising, but it wasn't bad.
Please know that this was my experience with dry needling, and everyone's experiences are different. I know that this can be painful for some, and everyone experiences pain in different ways.