How can i cure palpitation, and fast beating pulse at age of 20 unmarried female?

Treat the cause: You need to find out the cause of the palpitation before you can treat it adequately. Is it a thyroid problem, heart rhythm problem, heart structure problems, medication side effects, drugs...?See your doctor to get it evaluated. Once the cause is found, the treatment can then starts.

Depends on cause: Have to know exactly what type of heart rhythm you have to be able to say how to fix it. If its just fast, but regular, common causes include anxiety, hyperthyroidism, and dehydration. If it comes only in discrete episodes, common causes include panic attack, and less commonly genetic heart rhythm problems, or rumors that make adrenaline. Rule out the common causes first with your pcp.