There are many reasons for serious temporal depression, the common ones are congenital cranial insufficiency, congenital malnutrition, acquired insufficiency, aging or trauma, etc. All of them may lead to bony or soft tissue depression in temporal area. 1. Congenital craniosynostosis, mostly bilateral manifestation of the frontal transverse diameter is narrower, showing “”pear-shaped”” face. 2. Congenital malnutrition, in the process of cranial development, due to congenital malnutrition caused by calcium and other elements deficiency, resulting in temporal depression. 3. Acquired incomplete development, incomplete development in the process of acquired development, resulting in temporal depression. 4. Aging or trauma can lead to bony or soft tissue depressions, which can manifest as progressive facial atrophy or form after trauma often unilateral. There may be other causes of severe temporal depression, it is recommended to go to the hospital in time to find out the cause of the disease.