1. Genetic factors: Some people have short and wide thumb nails due to genetic factors, and may also be accompanied by hand deformity or hand dyskinesia. They can go to a regular hospital for plastic surgery to relieve their symptoms.

2. Trauma: The external force such as crush injury on the thumb causes the destruction of the thumb bone structure, and then the thumb becomes shorter and wider, and can be recovered according to the doctor's advice after operation.

3. Clubbed finger: refers to the swelling and thickening of fingers or toes, which should be treated according to the primary disease. Please ask the doctor to make a specific treatment plan.