Most of the gaps between the fingers are due to their own physiological reasons (such as family genetics, too thin) or diseases (such as rheumatism, rheumatoid) leading to deformation of the finger bones, finger gaps become larger. 1. Physiological reasons: If the gap between the fingers is simply large, without any discomfort, it may be due to physiological reasons, such as genetic inheritance, or ordinary people are thin, low body fat, fingers are too thin, etc. will appear larger finger gap. 2. Pathological reasons: when the patient has a disease, such as rheumatism, rheumatoid, osteoarthritis, occupational lesions, etc., leading to deformation of the finger joints, the finger gap becomes larger. If the patient has a large gap between the fingers, and accompanied by other symptoms, should go to the hospital in a timely manner, clear reasons for targeted treatment.