Working with the kettlebell

I had ICE session last week but experienced a hard pain on my back as soon as the ICE was over. The leg raise workout on the hard concrete triggered the pain I had many years back due to a hard fall on my back. The pain was sharp..I had to take leave from work, got Ceragem infrared treatment and took a jap from my doctor to ease me of the pain. My PT forbade me from any FIRE and ICE sessions until I fully recover. This has been my 3rd day but I am still getting that pain buzz on my back.