I have this agonizing condition. It is definitely aggravated by sun, so I don't leave the house without spraying 30+ on my arms. When I don't, it flares up. For flares, I whip out the ice pack. Not easy to do if you aren't close to an ice pack! lol So, best way for me to prevent flares is to protect from sun. I do have Osteoarthritis of spine with radiculopathy, cervical region, and Upper Motor Neuron Syndrome (spinal cord injury of some sort). I get trigger point injections in my muscle spasms (neck and upper back) from my Pain Specialist at UCSD Medical Center in La Jolla, as well as Neurofrequency Ablation procedures to heat up nerves in the facet joints so they shut down and prevent pain signals from being felt. That helps a lot, but sometimes the pain comes back and they just redo the ablation procedure. Ask for an anxiety med if you try this procedure. I am not adverse to the worst pain imaginable, but this procedure caused me to almost faint on the table due to involuntary autonomic nervous system reactions. It was not fun at all and I was sweating profusely, losing Blood pressure rapidly, asking for O2 etc, so please, please just ask for the anxiety med, and your body will thank you! You will just need a ride home.