It may be hard to diagnose cauda equina syndrome . Symptoms vary and may come on slowly. They also mimic other conditions. Frequent symptoms include: Severe low back pain; pain, numbness, or weakness in one or both legs that causes you to stumble or have trouble getting up from a chair; loss of or altered sensations in your legs, buttocks, inner thighs, backs of your legs, or feet that is severe or gets worse and worse; you may experience this as trouble feeling anything in the areas of your body that would sit in a saddle (called saddle anesthesia); recent problem with bladder or bowel function, such as trouble eliminating urine or waste (retention) or trouble holding it (incontinence). http://.