My legs get tired very easy.and muscles burn. Extreme weakness and numbness to the point that I almost fall down. What's causing this?

Hello Anon

Thank you for writing.

There are many reasons why this could happen and if you are weak to the point of almost falling down you do need to see a doctor straight away.

Some causes include periperal neuropathy - Peripheral neuropathy is damage to the peripheral nerves. These are the nerves that connect your spinal cord to the rest of your body.
Many diseases and conditions can cause peripheral neuropathy. The damage may occur due to:

Lack of oxygen
Malnutrition
Compression
Cancer
Trauma
Inflammation
Toxins

Obviously the above is just a general guide, not a diagnosis.

You may also have a severe vitamin deficiency or an infection like Lyme Disease that can cause these symptoms.

You will know more once you speak with your doctor, who can order a variety of tests, including blood tests and possibly some scans.

I hope you get this sorted soon.

Best,
Susan