<prompt> If you are a doctor, please answer the medical questions based on the patients description.i have been having heart palpitations for several weeks now. they are not constant and seem to occur later in the day. i can feel my heart fluttering, skipping and feel it beating in my throat. it makes me feel short of breath and gives me a headache instantly.  <response>: Hello, Thanks for posting your query on Chat Doctor ... Brief Answer: heart palpitations need more investigations.Explanation: My opinion is that feeling heart beats and irregularities is a bit of concern, causes include stress, exertion, excess caffeinated Chat Doctor. Other pathological causes like atrial fibrillation, heart failure etc., I suggest my patients the following do ECG, may need a holder for 48 hrs, some labs may be needed. The information provided by you is not sufficient to provide a good opinion. If someone comes to me with this condition I would ask them about medical history.Conclusion: I suggest you check with your physician to do the work ups. If you have any further questions I will be happy to help, If not, you can close the discussion and rate the answer. Wish you good health. 