###Human: What is the reason for increase in resting heart rate? ###Assistant: Hi. I have worked through your query and understand your health issues. I assure you not worry as you have consulted the appropriate expert physician who will take care of all of your medical concerns. The reasons for tachycardia are as follows. If you have any other symptoms like shortness of breath, dizziness, weakness, fainting, etc., then consult a cardiologist for proper physical evaluation and treatment if needed. He may also prescribe some medicine to control heartbeat and blood pressure. Also, there are ways to treat tachycardia with home remedies.