Oh! Do you have a link? I got this thing and it helps some if I'm diligent about using it, which I'm not! I always am good about that stuff until I feel better and then I stop, which is so dumb.
https://www.amazon.com/gp/product/B07QSFJ8S2/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
Yes, the content of the link contains an affiliate tag; I copied more than is necessary but here's part of the link:
/dp/B07QSFJ8S2/ref=asc_df_B07QSFJ8S2/?tag=hyprod-20&linkCode=df0&hvadid=366301073703&hvpos=&hvnetw
the portion after the dp - B07QSFJ8S2 - is the item ID. Everything after that is tracking or affiliate information. The ref tags where the user came from. The tag portion usually indicates affiliate stuff.
If you can't find one than this might help with the tension in your shoulder/neck area. My husband was getting a few really bad tension headaches a week (arthritis in the neck) and they've all but gone away since we got this. He should probably be using it daily but he forgets, so he'll lay on it when he feels the beginnings of the headache.
Fixing head forward posture makes a BIG difference. I use this thing for only 10mins a day and it’s awesome. I was using the back strap posture correctors but they didn’t help my neck posture much which I think is what makes the biggest difference to the look of the chin.
I know this isn't yoga, but get one of these: Neck and Shoulder Relaxer https://www.amazon.com/dp/B07QSFJ8S2
I had no idea I was even clenching my jaw until the first time I used it. It's the best purchase I've made in awhile. (In fact, I'm about to go use it right now)
Neck and Shoulder Relaxer, Cervical Traction Device for TMJ Pain Relief and Cervical Spine Alignment, Chiropractic Pillow Neck Stretcher(Blue) https://www.amazon.com/dp/B07QSFJ8S2/ref=cm_sw_r_cp_api_i_M67NT84HMX4WWRGH7345?_encoding=UTF8&psc=1 but that looks similar!
I found this when I was trying different products and it provides similar stretch and I find it very relieving.
Neck and Shoulder Relaxer, Cervical Traction Device for TMJ Pain Relief and Cervical Spine Alignment, Chiropractic Pillow https://www.amazon.ca/dp/B07QSFJ8S2/ref=cm_sw_r_cp_api_i_AS3D2R538XBBG83CEC37
Not OP but I believe this may be an example: https://www.amazon.com/Shoulder-Cervical-Traction-Alignment-Chiropractic/dp/B07QSFJ8S2#
I also carry a lot of stiffness in my neck. I bought a neck and shoulder relaxer on Amazon and it really helps, I usually will do it before bed but you can use it anytime.
https://www.amazon.com/dp/B07QSFJ8S2?psc=1&ref=ppx_yo2ov_dt_b_product_details
I get migraines and tension headaches. The difference is the headache comes from the back of my head and the migraine comes from the front right behind one of my eyes.
If I'm not careful, the headache will become a migraine. Exercise will exacerbate my tension headaches but will ease my migraines. Sometimes I guess wrong and come back from the gym in a lot of pain. The good thing is that Advil and a muscle relaxant will help my tension headaches.
I had a 4-month stretch of waking up with the tension headache every morning and was getting 2-3 migraines a week. What helped me take control was this cervical neck stretching thing: https://www.amazon.com/gp/product/B07QSFJ8S2/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
I also got a night guard to prevent teeth grinding at night from my dentist. (My sister who is a dental hygienist actually diagnosed me first. Her dentist confirmed.). She says some ridiculously large and unbelievable percentage of migraines/headaches/head discomfort actually originates in the mouth for most people.
I also got a personal trainer who is helping me with core, back, and shoulder exercises that take tension off my neck and shoulders. I got almost instant relief from just one session.
The blurry eye vision thing makes me think you should be checked for diabetes. My 62 yo dad's eyesight came back to 20/20 - no glasses needed - because of pressure build up in his eye due to diabetes. He also said he was waking up with headaches constantly and asking me for advice. His diabetes diagnosis and treatment fixed all that for him.
You could also try using a neck traction device. https://www.amazon.com/Shoulder-Cervical-Traction-Alignment-Chiropractic/dp/B07QSFJ8S2