Some patients will have swollen legs in the afternoon, the main reasons for this situation are as follows: 1. It is caused by long-term standing or sitting. After we get up in the morning, the lower limbs have been in the most downward part of the body, at this time this part will gradually due to standing or sitting some fluid accumulation, and in the afternoon to reach the peak. Because in the afternoon after work, as the body walks these fluids will gradually be carried away. 2, this situation may be due to long-term braking caused by. This is because the patient needs to sit and stand somewhere for a long time during the work process, then it will lead to the blood circulation of the lower extremities become very slow, and over time will lead to swelling, and reaches its peak in the afternoon. 3, this condition may be caused by cold in the lower extremities. For example, if the air conditioner is turned on too low in the room when the patient is at work and the lower limbs get cold, then it will cause swelling of the lower limbs, which will reach its peak in the afternoon. In summary, the swelling of the legs in the afternoon is caused by the effects of the above-mentioned causes and reaches its peak in the afternoon.