Blood acidity is also known as high blood acid, because blood acid is blood uric acid, so it can also be expressed as high blood uric acid. High uric acid is a metabolic disease caused by the increase of uric acid in the blood due to the metabolic disorder of a substance called purine in human body. Routine blood tests, including hemoglobin, white blood cell count and classification, platelet count, sedimentation rate, etc. 2.Blood chemistry examination, including urea nitrogen, non-protein nitrogen, creatinine, alkaline phosphatase, total protein and albumin, globulin, transaminase and transpeptidase, etc. 3.Serum immunoglobulin test. 4.Urinary routine examination. 5.Iliac bone aspiration smear or biopsy. 6.Radiological examination: frontal and lateral x-ray of chest and lymphography of both lower limbs. 7.Pathological examination: lymph nodes, skin biopsy and liver aspiration biopsy if necessary.