Hidden pain in the third finger below the collarbone may be related to muscle strain, rib fracture, shingles, heart disease and lung disease. 1. Muscle strain: the pectoralis major muscle may be strained when doing exercises such as expanding the chest, and the symptom of vague pain at the lower three fingers of the clavicle will appear. 2. Rib fracture: traumatic chest landing may cause rib fracture, there will be hidden pain below the clavicle, and may also be accompanied by swelling, subcutaneous bruising and other symptoms. 3. Herpes zoster: herpes zoster infection invades the intercostal nerve, there will also be symptoms of vague pain in the lower three fingers of the clavicle, there may also be scattered or bunches of blisters. 4. Heart disease: heart attack such as angina pectoris, myocardial infarction will also appear on the left side of the ribcage below the three fingers of the symptoms of hidden pain. 5. Lung diseases: lung diseases such as lung abscess, lung tumor, pleurisy, etc. can also cause symptoms of vague pain in the chest at the lower three fingers of the clavicle. If there is a vague pain in the lower three fingers of the clavicle, it is recommended that the patient go to the hospital to clarify the cause of the disease and receive regular treatment.