Hi your question is not very clear.. please elaborate a bit as to what is the issue.
If you have increased heart rate which you would know by perceiving your own hear beat going fast ..you should consult your endocrinologist to see if the dose for your
thyroid problem is ok or not..and after it is ruled out other causes should be looked into..lot of things can increase your heart rate including anxiety..
Next Steps
If that is the major concern consult your doctor.