Feeling a vague pain in the right chest and moving to the right arm pain may be caused by neurosis, organic lesions of the heart, tendonitis and other diseases. 1. Neurosis: it is a general term for a series of mental diseases or disorders that are not organic lesions. At the onset, some patients may have symptoms such as vague pain in the right chest and pain in the arm, and then vague pain in the right chest and pain in the right arm may occur. 2. Organic cardiac lesions: including coronary atherosclerosis, myocardial infarction, etc. These diseases will affect the blood flow in the coronary arteries, resulting in myocardial hypoxia, which will lead to vague pain in the right chest and move to the right arm pain. 3. Tendonitis: it is a kind of sterile inflammatory reaction, and there will be pain and pressure pain in the lesion area, and the function will be hindered during movement, which will cause hidden pain in the right chest and pain moving to the right arm. Feeling a vague pain in the right chest and moving to the right arm pain, may also be chronic gastritis, cervical spondylosis and other diseases, it is recommended to go to the hospital as soon as possible to investigate, and according to the doctor’s advice targeted treatment.