Arm cuts do not bleed and are painful because the soft tissue is superficial and the dermis is not injured. Arm cuts did not bleed, because the superficial epidermis or dermis of the cut is shallow, the capillaries in the dermis have not been damaged, so there is no bleeding, but only the problem of pain. After the arm is scratched, it is recommended that the local use of povidone-iodine to disinfect, disinfection, pay attention to gently wipe from the inside out, has been wiped to the wound around the three centimeters or so, a day of disinfection of about 2 ~ 3 times, do not scratch with your hands, do not get wet, generally in 3 ~ 5 days of gradual recovery. The arm scratch mouth appears pain, but did not bleed, if necessary, consult the regular hospital general surgery treatment, so as not to delay the condition.