Itchy swollen fingers and a little hard, may be related to mosquito bites, eczema, urticaria or Raynaud’s syndrome and other reasons. 1. After mosquito bites, the local skin due to inflammatory reaction and edema fluid exudation, causing local redness, edema, hardness and itching symptoms. 2. Hand eczema: hand contact with external stimuli more, easy to occur eczema, can appear dry dark red spots, local infiltration and hypertrophy; sweat herpes belongs to the hand eczema special type, lesions are deep in the blisters, with varying degrees of itching, scratching can lead to local redness, swelling. 3. Urticaria: most patients can not find the exact cause of the disease, local skin and mucous membrane due to a temporary increase in vascular permeability, there may be limited edema, itching, swelling of the affected skin, there are papules or wind, local hardness. 4. Raynaud’s syndrome: small arterial spasm of the extremities, color change of the skin of the hands or feet, in the emotional excitement or cold, the fingers or even the palm of the pins and needles, numbness or even ants, etc., with the arterial congestion, the symptoms gradually improve. When the fingers are itchy, swollen or hard, or when skin lesions appear, you can consult a doctor in time and follow the doctor’s instructions for symptomatic treatment.