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A member asked:
Can anyone tell me what causes a person's leg to just collapse sometimes?
3 doctors weighed in across 2 answers
SIJ: Sudden leg collapse has various causes. Interarticular "joint mice" & meniscal tears can suddenly shift in knee joint causing acute wedges that elicit pain & involuntary loss of leg strength; causing leg to give out; as can sacroiliac joint, SIJ, disorder, as it suddenly subluxes causing SIJ hyper-rotation & impingement/paresis of the overlying presacral plexus; the sciatic nerve "headwater".
Answered 3/11/2018
2.1k views
Leg weakness: You may need some blood work to make sure electrolytes are ok, to start with.
Answered 3/11/2018
2.1k views
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