Low hydroxyvitamin D is considered to be related to vitamin D deficiency, hepatitis and other factors. 1. Vitamin D deficiency: generally due to the lack of vitamin D can not be converted into hydroxyvitamin D, which in turn causes the phenomenon of low hydroxyvitamin D. The lack of vitamin D may also cause muscle pain, affect the breakdown of fat and other symptoms. Lack of vitamin D may also cause muscle pain, affect the decomposition of fat and other symptoms, through appropriate consumption of food containing vitamins, can be appropriate sun exposure and other ways to supplement vitamins. 2. Hepatitis: may be due to hepatitis, resulting in liver function is impaired, affecting the process of vitamin D conversion, caused by hydroxy vitamin D low phenomenon. Hepatitis usually appears nausea, vomiting, abdominal distension and other symptoms, can follow the doctor’s instructions to use entecavir dispersible tablets and other drugs to treat. If the phenomenon of low hydroxyvitamin D, you should consult the doctor in time, and actively treat, so as not to delay the condition.