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Doctor insights on: Knee Collapsed

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I get really dizzy & my vision goes white (can't see), usually when I stand up. Sometimes my knees buckle, I collapse. Usually only for 10~20 secs. Y?

I get really dizzy & my vision goes white (can't see), usually when I stand up. Sometimes my knees buckle, I collapse. Usually only for 10~20 secs. Y?

Postural hypotension: Feeling lightheaded on standing , having blurry vision and collapsing is most like drop in blood pressure , called postural hypotension. In most cases it does not indicate anything sinister but falls secondary to it can cause injury . Certain blood pressure medications, dehydration due to diarrhoea, vomiting can also result in postural hypotension. See Gp for review if symptoms occur regularly. ...Read more

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Dr. James Dukelow
271 doctors shared insights

Collapse (Definition)

Collapse = rapid prostration. ...Read more


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I have had pain in my left knee for over two years. Nothing showed up on X-ray over a year ago. Hurts when sitting. If i walk a lot starts to collapse?

I have had pain in my left knee for over two years. Nothing showed up on X-ray over a year ago. Hurts when sitting. If i walk a lot starts to collapse?

See your doctor and: After a complete history and physical, if there is no sure diagnosis, ask for either a knee MRI or a consult with a sports medicine physician or an orthopedic surgeon. 2 years of knee pain in a 19 yo, esp with "giving way", is not normal and needs to be further evaluated. ...Read more

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My right knee has this sharp pain everyday unpredictably, bordering the knee cap. It will make me collapse or limb heavily. What might be happening?

My right knee has this sharp pain everyday unpredictably, bordering the knee cap. It will make me collapse or limb heavily. What might be happening?

Inflammed tendon, or: Pain below the patella is commonly (not always) due to inflammation of the patella tendon, aka "jumper's knee". Chondromalacia/arthritis is also a consideration. Typical treatment options consist of rice, antiinflammatories, physical therapy, counterbrace supports, massage, injections. Your orthopedic physician can provide a more accurate diagnosis with a physical exam and possible x-ray. ...Read more

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I have muscle weakness due to a now stable thoracic syrinx. Lately i've been falling more and my knee collapses while walking. Syrinx progressing?

Syrinx: It could suggest progression of the problem. Only way to confirm this would be a good clinical exam and imaging studies like mri. You should see your treating physician. ...Read more

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Knee cracking pain only going upstairs, knee collapsed , crunching sounds, lack of extension patella not tracking as per physio what is the cause?

Knee cracking pain only going upstairs, knee collapsed , crunching sounds, lack of extension patella not tracking as per physio what is the cause?

Patellofemoral issue: The likely cause of your condition is that the knee cap is getting off track when you bend your knee due to lack of quad muscle strength (VMO). This causes the knee cap to track laterally when you bend your knee and leads to cartilage irritation (chondromalacia) under the knee cap which can cause aching and produce crunching sounds. Keep working with your physio to correct the problem. ...Read more

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I have transverse myelitis, I have been doing physio for 14 months, but when i walk my right knee just collapses forward as soon as i weight-bare why?

I have transverse myelitis, I have been doing physio for 14 months, but when i walk my right knee just collapses forward as soon as i weight-bare why?

UMN weakness: Upper motor neuron weakness from inflammation injury of the spine (transverse myelitis) typically causes spastic weakness: even though the muscles are tight and may at times cramp or spasm, they are still weak b/c the brain lost control over voluntary movement of affected muscles. Ask about adding neuromuscular electrical stimulator (nmes) to rehab routine. Good luck! ...Read more