If a patient has a lumbar disc herniation of about 5mm, whether it is serious or not cannot be generalized, it needs to be determined on a case-by-case basis, and it is generally not considered to be a particularly serious condition. Generally speaking, if a patient’s lumbar disc herniation is below 5mm, their lesion tends to be a milder condition. A herniation of 5mm to 10mm or so is a moderate condition. A herniation of 10mm or more is considered a severe lesion. However, the evaluation of these patients cannot be based solely on the distance of the protrusion. This is due to the fact that different patients have different herniated areas and different volumes of the spinal canal, which can result in significant differences in the degree of compression of the associated nerves. In some patients, although the degree of herniation on imaging is mild, the symptoms are very obvious. In some patients, the degree of herniation is high, but the symptoms are not obvious. Therefore, it is recommended that patients should return to the orthopedic department for a follow-up examination to have the doctor assess the severity of the lesion through a series of comprehensive examinations.