A sudden increase in a heartbeat is a symptoms of tachycardia. A sudden increase in heart rate is sometimes normal, such as after seeing something scary, after a dangerous accident or after something unexpected happens. But if you often feel your heart rate increase, then it can be a sign of serious heart disease. The risk of tachycardia is higher in people who consume alcohol or tobacco products like bidi, cigarettes, khaini, hookah, gutkha, paan, etc. Apart from this, the problem of increased heartbeat is also found in people who drink tea and coffee for a long time. But sometimes a suddenly increased heartbeat can be a sign of a serious disease or a heart attack. So there is a need to be careful with it.