Leg and stomach pain is not necessarily thrombus, but also can be seen in sciatic nerve compression, spinal tumor, etc. The etiology is different and the symptoms are different, all of them can have dull pain and sharp pain localized in the calf. 1. Deep vein thrombosis of the lower limb can be manifested as persistent swelling and pain in the occluded part of the calf, accompanied by swelling of the lower limb, and high skin temperature in the acute stage. With the progress of the disease, the skin temperature becomes low and the skin color is blue-purple, which may be accompanied by systemic symptoms such as indifference, high fever and so on. 2. Lumbar intervertebral disc herniation can compress the spinal cord and cause sciatica, which manifests as pain, numbness and unfavorable activity of the lower limbs, and the pain radiates from the buttocks along the back of the thighs to the calves and the back of the feet. 3. Spinal cord tumor compresses the spinal cord root, which can cause local pain, such as electric burn, needle prick, cut and so on, which can be aggravated when sneezing and coughing. The causes of leg and stomach pain are various, not always caused by blood clots, need to consult a doctor in time, under the guidance of the doctor’s standardized examination, symptomatic treatment.