It might be related with your spine and spine nerve compression. As you are suffering from RA and OA you might have PIVD. The term PIVD /prolapsed intervertebral disc
means the protrusion or extrusion of the nucleus pulposus
through a rent in the annulus fibrosus
Prolapsed disc (commonly called a 'slipped disc'), a disc does not actually 'slip' but part of the inner softer part of the disc bulges out through a weakness in the outer part of the disc.
Symptoms of PIVD are Severe low-back pain
, Pain radiating to the buttocks, legs, and feet, Muscle spasm, Tingling or numbness in legs or feet, Muscle weakness
or atrophy in later stages.
To rule out PIVD you must do your X-ray LS spine or MRI LS spine.
Dr. Dinesh Bhatia