spike feeling doesn't sound familiar to me. I have had very sharp sciatica pain in leg.
Not to alarm you, but if you've had the disease for a while and this is a new acute pain, then you might want to go to urgent care and make sure there is not a fracture. Sometimes people report getting fractures from something minor. Outcomes are better when fractures are found and treated quickly.
AS, U C, Iritis, migraines. HLA-B27neg. Yoga (instructor) & spin. No meds at this time. Dx 1989. SAA member/donor since 1993. All my posts are personal opinion/feelings and do not represent the SAA. Help find a cure & support others by donating to the SAA.