This is chronic pain that occurs as a complication of radiation therapy and may manifest weeks, months, or even years after treatment. The causes include damage to nerves, soft tissues, bones, or joints in the irradiated area resulting from radiation therapy. The pain may be neuropathic in nature (burning, shooting) or caused by tissue fibrosis and impaired blood flow. The severity of the condition depends on the radiation dose, the treated area, and individual factors.