Every night, when some patients get up or wake up and get out of bed, there is a feeling of swelling and pain in the lower back, there may be many factors: 1, such as whether the previous day is cold, after the cold will appear this symptom; 2, or the day too much exercise, the whole muscle appears some anaerobic metabolism, at this time some acid secretion, will also appear the soreness of the lower back; 3, there are also some local inflammation, such as long-term Sitting, standing these factors, resulting in some local inflammatory exudation, can not go to timely absorption, then some inflammation of the lumbar back fascia, will also appear some lumbar acid, swelling, pain feeling. If this symptom can disappear in the morning, it may be a symptom of muscle strain, and if the pain and soreness of the back disappears after activity, it may be a symptom of muscle strain. We need to consider all of them.