What is the best treatment to ease siatica?

Time plus: Time is the best healer but activity restriction, guided exercise, medication especially a steroid pack, and even epidural steroid injections may help. Cessation of smoking, weight reduction and regular exercise will help prevent a recurrence which has a rate of 5% if due to a disc herniation.

Spine Pain Options: This chronic pain in the distribution as you suggested is the result of an irritated nerve or facet joints or other injury typically in the lumbar spine (low back) which are caused by herniated disks, spinal stenosis or degenerative disc disease, etc requiring further evaluation by a spine specialist and may be candidate for facet injections/radiofrequency ablation and epidural steroid injection.