The difference between calcification and calcified foci is mainly as follows: calcification can be a noun or a verb, for example, the situation of calcification in the area is a noun; while if the area is in the process of calcification, this situation refers to a verb, so calcification refers to the phenomenon of localized calcification. A calcified lesion is a lesion that is formed locally as a result of local calcification, which can be clarified by relevant imaging or ultrasound examinations. Calcified foci can only exist when calcification is present, the difference being that calcification is present before the formation of calcified foci. When calcification is present, it must be treated promptly, and if a calcified lesion is formed locally, the need for surgical removal of such a calcified lesion is determined on a case-by-case basis.