The common causes of swollen hands in the cold include osteoarthritis, rheumatoid arthritis and Raynaud’s syndrome. 1. Osteoarthritis: chronic progression of the process of cold stimulation of the hands for many years, the formation of osteoarthritis, the later may be swollen in the cold after the symptoms. 2. Rheumatoid arthritis: rheumatoid arthritis is sensitive to cold stimuli, and the fingers may swell up after being stimulated. 3. Raynaud’s syndrome: due to the sensitivity to cold stimuli, the hand is cold after the rapid contraction of capillaries, resulting in local ischemia and swelling. The hand is swollen when cold, there may be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor for standardized treatment.