Thumb nail depression

Thumb nail plate depression is a common nail deformity, more known as spoon nail or anti-nail. To the plate thinning, the central depression and the surrounding ridge was spoon shaped characteristics, common reasons are: 1. Hypoxia will cause the human arterial oxygen partial pressure drop, causing peripheral tissue blood circulation hypoxia, resulting in nail nutrition metabolism disorder, the formation of nail depression. 2. Frequent use of cold water wash hands, or frequent contact with cold water, which will also cause the thumb to show nail depression symptoms. 3. Suffering from iron deficiency anemia and Raynaud's disease causes limb ischemia, which can cause nail depression. 4. Oxygenation: Hypoxia can cause the arterial oxygen partial pressure of the human body to decrease, causing hypoxia in blood circulation of surrounding tissues, causing nail nutrition metabolism disorder, forming nail depression.