Myocardial ischemia, pneumonia, allergies, shingles, etc. can cause itching and pain inside the chest. 1. Myocardial ischemia: Myocardial ischemia may cause itching and pain on the left side of the chest, and during the attack, the patient may also feel tightness in the chest, tightness in the chest, shortness of breath and other uncomfortable symptoms. 2. Pneumonia: Pneumonia is caused by infectious factors, such as bacterial infection, viral infection, etc. Patients will not only feel itchy and painful inside the chest, but also have trouble breathing and coughing, and the itchy and painful symptoms will be more obvious when coughing. 3. Allergy: when allergic to dust, mites – drugs and other factors, the patient may feel itchy inside the chest, accompanied by rashes, itching and other symptoms. 4. Herpes zoster: the onset of this disease can appear skin discomfort, itchy skin self-conscious itchy inside the chest, and along the ribcage walk accompanied by the formation of herpes of varying sizes. Itchy symptoms inside the chest, there may be other reasons, you need to go to the hospital in time for examination, and actively cooperate with the doctor treatment.