Anything that traps, compresses, or otherwise squeezes nervous tissue can be what causes pinched nerves in your body. Usually a traumatic injury, inflammation, pre-existing conditions like arthritis, repetitive stress, or weight gain cause some tissue to press against your sensitive nerves. The culprit could be hard bone or cartilage trapping the tissue, or soft connectors or muscles that are swollen and enlarged. The pressure causes damage and encourages your nerves to misfire, so you develop burning, aching, or pins-and-needles pain in your lower limbs.
A pinched nerve can be quite serious, so don’t ignore the discomfort and hope the issue will improve over time. When the sensitive tissue is compressed and limited for too long, the damage may become permanent.