<s>[INST] Hello doctor, I am having some chest pain on my left side. It feels like it is around my heart. Kind of a slow, deep ache from my armpit, over the whole chest, up to the clavicle. I have been having a bit short of breath, and when I stand up I feel really dizzy and light-headed. It takes about 10-15 seconds to feel normal again. It has been like this for the last three to four days. But I have experienced pain in my chest like this before, but it has gone away in a day or two. I am 29 years old. I have a healthy diet and no previous health concerns. [/INST] Hello. Firstly, this does not appear to be CAD (coronary artery disease) related pain to me, however, it should be evaluated to rule out some unusual cardiac causes, especially valvular problems. Because of your age, long duration of symptoms without treatment and atypical nature of pain, it does not look like pain due to CAD. Now anginal pain would typically increase or occurs on exertion and relieves with rest. And cardiac pain would persist for a few minutes rather than seconds and does not remain round the clock. Intermittent chest pains may not be cardiac. Such pains are usually due to acid reflux. Acid reflux pain occurs more frequently in lying down position, occurs intermittently, persists for a few seconds to minutes. So, yours may be related to it. Other gastric symptoms may be associated like epigastric pain, bloating and burping, etc. Another possibility should be considered is of costochondritis, if there is definite tenderness over the chest wall. See if you also have any neck pain, tingling, numbness, etc, for cervical pains. Regarding dizziness, it is likely postural hypotension. This may occur due to dehydration so keep yourself well hydrated and have a proper diet. If you have a BP apparatus then should check your blood pressure (BP). Now if shortness of breath is significant, then this needs early evaluation with examination and tests like ECG (electrocardiography) and echo. So, your symptoms are nonspecific and overlap with many non-cardiac and benign causes as well. But you will need a thorough evaluation with an examination, ECG and echo to rule out cardiac problems. I hope this helps. </s>