There are many reasons for numbness in the fingers, such as peripheral neuritis, cervical spine disease, diabetes, trauma, frostbite, mosquito bites, infections, allergies and other reasons. 1. Peripheral neuritis: Peripheral neuritis can cause localized numbness, hyperalgesia and other symptoms, which may lead to numbness in the fingers. 2. Cervical spine disease: cervical spine degenerative disease, may compress the local nerve, resulting in numbness of the finger. 3. Diabetes: diabetes may cause neuropathy, resulting in numbness in the fingers. 4. Trauma: external extrusion and other causes of blood circulation disorders, may cause localized swelling and numbness, resulting in numbness of the finger. 5. Frostbite: stimulated by the lower temperature of the external environment will cause poor local circulation, may also lead to numbness of the finger. 6. Mosquito bites: local mosquito bites can cause an inflammatory reaction, resulting in congestion, swelling, numbness, itching, pain, etc., will also appear numbness of the finger. 7. Infections: such as bacterial infections, fungal infections caused by local inflammatory reaction, may also affect the nerve function, resulting in numbness of the finger. 8. Allergy: skin contact with allergens caused by contact dermatitis, or allergic causes of eczema, hives, etc., may also lead to numbness and itching of the finger belly symptoms. Finger belly numbness, there may be other reasons, you need to go to the hospital in a timely manner, as prescribed by the appropriate examination to confirm the cause of the diagnosis.