Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the symptoms of Peripheral Arterial Disease (P.A.D.) ?
    ### Response:
    People who have P.A.D. may have symptoms when walking or climbing stairs. These may include pain, numbness, aching, or heaviness in the leg muscles. Symptoms may also include cramping in the affected leg(s) and in the buttocks, thighs, calves, and feet. Some possible signs of P.
    