Leg burning sensation can result from a number of causes, including damage to nerves in the legs from exposure to extreme heat or cold or to toxic substances. Leg burning sensation might also result from a circulation problem that impairs blood flow to the legs, a leg injury, or intense exercise.
Swollen feet can have several different causes. They are all do to increase in the amount of fluid in your feet and ankles. Since you swelling seems to happen later in the evening, and you have no other symptoms, I would guess that your swelling is due to venous insufficiency. This is when the veins in your legs have trouble getting blood from your feet back up to your heart. It is the most common blood vessel disease.
Swelling of the lower leg and ankle is a common problem. Determining the cause of ankle swelling is the first step to finding effective treatment. Once the cause of the ankle swelling is determined, effective treatment can be initiated. Ankle swelling causes the accumulation of fluid within the ankle joint or in the soft tissues surrounding the ankle. Common causes of ankle swelling include: Traumatic Injury. A traumatic injury, such as an ankle sprain or a broken ankle, is the most common cause of ankle swelling. Patients almost always remember the particular injury, but occasionally even subtle injuries can also lead to ankle swelling. Also, stress fractures can occur around the ankle joint leading to swelling.