Weakness after multiple abrasions all over the body may be stimulated by pain, in addition, there may also be secondary infections and other causes of fever, resulting in weakness. 1. Painful stimulation: multiple abrasions all over the body will cause direct damage to the local skin and mucous membrane, resulting in local redness, swelling and pain, which may cause mental tension and psychological burden, thus causing weakness and other complications. 2. secondary infection: after the whole body multiple abrasions, wounds, if there is secondary infection, there may be inflammation to stimulate the thermoregulatory center leading to fever, thus causing weakness. After the whole body multiple abrasions weakness, it is recommended to go to the hospital in time for examination, there are infections, need to actively under the guidance of the doctor to choose antibiotic treatment.