Swollen and painful finger joints often occur during pregnancy for reasons including water and sodium retention and pathological factors, as follows: 1. Water and sodium retention: Local edema is a non-specific physiological reaction that usually does not require special treatment and will improve on its own after the end of pregnancy. High secretion of estrogen and progesterone during pregnancy and increased vascular permeability often cause systemic edema, including edema of the lower limbs and edema at the finger joints, etc. 2. Pathological conditions: such as rheumatic diseases and immune abnormalities, which require consultation and treatment at the Department of Rheumatology and Immunology to exclude autoimmune diseases, such as systemic lupus erythematosus, but such diseases are relatively rare. Edema should also check the blood routine as well as the urine routine, and also check the blood pressure. If the blood pressure is elevated with positive urine protein and edema, it is considered to be pre-eclampsia and needs to be treated according to pre-eclampsia.