To diagnose dry syndrome, the required tests can usually be completed in one day. In addition, dry syndrome is a systemic disease, and it may take 2-3 days to perform all the tests if needed. For the time required for the examination of dry syndrome, it should be answered from several aspects. First of all, from the clinical symptoms examination, the most common symptoms of dry syndrome patients visiting the clinic are dry mouth and dry eyes. In addition to eyes, lips and mouth, dental examination is also needed. Since more patients with dry syndrome have rheumatoid arthritis manifestation, so joint examination should be conducted. At the same time, patients with dry syndrome have more lung damage, so high-resolution CT examination is needed in the early stage. Nowadays, the most important thing to confirm the diagnosis of desiccation syndrome is serological examination, i.e. antinuclear antibody examination, especially about the titer of antinuclear antibody, as well as the titer and expression of anti-SSA antibody and anti-SSB antibody. All the above tests can be done in a relatively short period of time, and the diagnosis can usually be made within one day. Dry syndrome is a multi-system damage, including joints, lungs, eyes, kidneys, liver, etc. If all tests are performed, it may take 2-3 days, only the time required to diagnose dry syndrome is relatively short.