Finger numbness and redness after infusion, if caused by allergy, can be treated by drugs, if caused by infusion posture, can be improved by appropriate activities. 1. Allergic reasons: allergic to a certain component of the drug in the infusion process can lead to numbness and redness of the fingers, which can be accompanied by itching of the hands, skin rashes, and even laryngeal edema, respiratory difficulties, and life-threatening and so on. Under the guidance of the doctor, Benadryl Injection, Dexamethasone Acetate Injection and other drugs can be applied to treat the disease, which can play the role of anti-allergy and relieve the above symptoms. 2. Improper infusion posture: when the hand stays in a fixed position for a long time during infusion, the nerves or blood vessels of the hand are compressed, causing a decrease in the blood supply of the blood vessels, and the sensation of the hand is impaired, causing numbness of the hand. In this case, only need to appropriate limb activities or massage can be relieved on their own, no need to take any oral medication. If a short period of time can not be relieved or other accompanying symptoms, need to go to the hospital, a clear diagnosis of the cause of the targeted treatment, the drug should be applied under the guidance of a doctor, they can not be randomly used.