Spacticity is actually ecxessive muscle tone and this is commonly seen in patients after a stroke.
Physiotherapists and manual therapists can help with spacticity through release of the tissue while Rehabilitation Medicine phsyicians can help through botox injections into the muscle. If specific muscles are affected, then doing the injection under ultrasound guidance can help.
Once the spasticiy is dealt with, it can ease pain significantly but due to the botox, doing exercise to strengthen the muscle will then be quite challenging. Working with your Rehab Physician and their team is very important in helping patients with spaciticity.
Hope this helps.