The causes of right leg soreness and swelling pain may include lactic acid buildup in the leg, lumbar disc herniation, and trauma, etc. It is important to choose the appropriate care and treatment according to the different causes so as not to delay the condition. 1. Lactic acid buildup in the legs: Due to prolonged physical exercise or not exercising at all and suddenly doing a lot of exercise, lactic acid buildup in the right leg causes soreness and swelling in the right leg. Pay attention to rest, combine work and rest, you can relieve the symptoms through hot compresses, massage and other ways. 2. Lumbar disc herniation: Lumbar disc herniation will compress the spinal nerve root, which will lead to right leg soreness and discomfort. To change some bad habits and posture, you can wear elastic waist and other supports can limit the lumbar activities, while following the doctor’s advice to take celecoxib, ibuprofen, diclofenac and so on to reduce the symptoms. 3. Trauma: the right leg is stimulated by trauma, will cause soft tissue or bone tissue damage, resulting in right leg pain. It is necessary to go to the hospital in time to take pictures to make a clear diagnosis, and at the same time limit the activities of the right leg to prevent aggravation of the symptoms. There may also be other reasons, such as vascular lesions of the lower limbs, etc. It is recommended to go to a regular hospital in time and consult a specialist for guidance.