The common causes of skin swelling in the finger area are as follows: 1, trauma: for example, lacerations, contusions, or various trauma-induced inflammatory lesions of the skin of the finger area, clinically manifested as local redness, swelling, heat and pain, that is, swelling; 2, mosquito bites: the finger area is the distal part of the body, easily bitten by mosquitoes, and insect bite dermatitis, mostly seen in children. The skin of the finger area by mosquito bites can lead to insect bite dermatitis, also manifested as red swelling of the skin of the finger area, or blisters at the top, accompanied by itching; 3, frostbite: frostbite is caused by cold stimulation leads to local vascular spasm or contraction, poor blood circulation, and swollen skin damage, can be accompanied by itching, burning and burning pain. Therefore, there are more causes of skin swelling in the finger area. Patients with clinical manifestations of skin swelling in the finger area should go to the dermatology department of a regular hospital in a timely manner. Detailed examination by a dermatologist is required to clarify the diagnosis and cause.