There are a few reasons why your resting heart rate might have suddenly increased. Some of these reasons are harmless, while others may be a sign of a medical condition.

• Normal changes: Your resting heart rate can vary depending on a number of factors, including your age, fitness level, and activity level. For example, your resting heart rate is typically lower in children and young adults than in older adults. Your resting heart rate may also increase if you have been exercising or if you are feeling stressed or anxious.
• Medical conditions: Some medical conditions can also cause an increase in resting heart rate. These conditions include:
  • Anemia: Anemia is a condition in which your body does not have enough healthy red blood cells. This can cause your heart to work harder to pump blood throughout your body, which can lead to an increase in resting heart rate.
  • Heart disease: Heart disease is a condition that affects the heart. It can cause an increase in resting heart rate, as well as other symptoms, such as chest pain, shortness of breath, and fatigue.
  • Thyroid problems: Thyroid problems can also cause an increase in resting heart rate. Hypothyroidism, which is when the thyroid gland does not produce enough hormones, can cause a slow heart rate. Hyperthyroidism, which is when the thyroid gland produces too many hormones, can cause a fast heart rate.

If you are concerned about your resting heart rate, it is important to talk to your doctor. They can help you determine the cause of your increased heart rate and recommend treatment, if necessary.

Here are some tips for taking your resting heart rate:

• Sit or lie down in a comfortable position.
• Place your index and middle fingers on your wrist, just below your thumb.
• Count the number of beats you feel for one minute.
• Your resting heart rate is the average number of beats you feel per minute.

If you are taking your resting heart rate for the first time, it is a good idea to do it several times over a few days to get an average. This will help you to track any changes in your heart rate over time.

If you notice that your resting heart rate is consistently higher than normal, or if you are experiencing other symptoms, such as chest pain, shortness of breath, or fatigue, it is important to talk to your doctor. They can help you determine the cause of your increased heart rate and recommend treatment, if necessary.