The arm abrasion scab but the edge of the redness and swelling generally 7 ~ 30 days can gradually recover. Arm abrasion scab edge red swelling is generally due to the local inflammatory reaction caused by the symptoms are not serious can be self-absorbed recovery, generally in about 7 days the redness and swelling can gradually subside, serious cases may be about 1 month to gradually recover, you can use erythromycin ointment under the guidance of the physician, fusidic acid cream and other drugs for anti-infective treatment. The arm abrasion in the scab recovery process may appear local itching symptoms, to avoid scratching the affected area, keep the local clean and dry, conducive to the recovery of the skin lesions, try to avoid eating spicy stimulating food, redness and swelling for a long time does not subside or the local pain is serious, we should consult a doctor for treatment in a timely manner, and strictly comply with the doctor’s instructions to use the drug. The arm bruise after the discomfort, should promptly consult a doctor, under the guidance of the doctor standardized treatment, so as not to delay the condition.