The swelling of the right leg may be caused by physiological reasons, or it may be caused by lumbar spondylosis, neuropathy, lower limb vascular disease and other pathological reasons. 1. Physiological causes: commonly due to prolonged standing caused by poor local circulation in the lower limbs, may feel the lower limbs swelling, but no obvious swelling. 2. Lumbar spine lesion: herniated intervertebral discs may compress the nerves, leading to symptoms such as soreness and swelling in the innervated areas of the lower limbs. 3. Neuropathy: When viral neuritis, peripheral neuritis or diabetes causes peripheral neuropathy, patients with abnormal nerve sensation may consciously feel swelling in the legs. 4. Lower extremity vascular lesions: such as right lower extremity deep vein thrombosis, phlebitis of the lower extremities, venous artery valve closure insufficiency and other diseases, in the early stages of the disease, patients are often swelling is not obvious, but the feeling of swelling. The right leg is not swollen, but there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.