Right rib pain when pressed may be caused by fracture, pleurisy, costochondritis, herpes zoster, multiple myeloma and so on. 1. Fracture: the right rib is violently impacted, extruded, contused and other traumatic injuries, resulting in rib fracture, dislocation or soft tissue injury, so the symptom of pain when pressed will occur. 2. Pleurisy: bacterial infection, autoimmune diseases and other factors lead to increased inflammatory exudation of the pleura, pressing the right side of the ribs leads to increased friction between the pleura and the chest wall, stimulating the inflammatory pain to aggravate, so the symptom of pain when pressed occurs. 3. Costochondritis: mainly occurs in the costal cartilage area at the junction of sternum and ribs, due to the inflammatory reaction leading to pain on pressing. 4. Herpes zoster: Herpes zoster virus infection on the skin of the right chest surface leads to blisters and rashes on the chest wall, and when the ribs are pressed, the nerves in the lesion area are compressed, resulting in the symptom of pain when pressed. 5. Multiple myeloma: malignant clonal proliferation of plasma cells, infiltration to the whole body bone marrow tissues, often appearing symptoms such as sternal pain, low back pain, rib pain. Right rib pain when pressed may be related to many factors, and it is recommended to consult doctor for clear diagnosis and symptomatic treatment.