How long after having blood drawn can I take a shower?

Blood tests are the most common medical examination method. Small skin damage will occur when blood is drawn, so you must prevent infection at this time. It is best not to take a bath within 24 to 48 hours after blood is drawn. People with skin that does not heal well should pay more attention to this aspect. Once infection or pain occurs, scars may be left, which will have an adverse effect on your health.

How long after having blood drawn can I take a shower?

Blood is drawn from the median cubital vein. The needle is relatively thick. If you take a shower, bacteria may enter the blood through the above path (just like a wound cannot be exposed to water and must be disinfected with alcohol, the same principle!), so you are not allowed to take a shower. There will be no problem after 24-48 hours. It is a small wound and the body can repair it completely quickly without leaving any scars.

What can a blood test check?

1.2. Red blood cells

Hemoglobin in red blood cells can combine with oxygen under the regulation of iron. Therefore, the important function of hemoglobin is to transport oxygen to various parts of the body.

If the number of red blood cells in the blood decreases or their structure is distorted, it will affect the oxygen-carrying capacity of hemoglobin. The blood's ability to transport oxygen is reduced, causing dizziness, blurred vision, etc.

leukocyte

White blood cells are the body's immune cells that specifically attack viruses, bacteria and parasites, so they are called "home defenders." When the human body is invaded by the above three pathogens, the white blood cells in the blood will increase and encircle and attack the invaders.

3. Platelets

The main function of platelets is to stop bleeding and coagulate blood. When a person is injured and a blood vessel ruptures, platelets gather there to form a blood clot that blocks the rupture.

In addition, it also releases substances that promote blood coagulation and accelerate the coagulation of blood clots. Moreover, in order to reduce blood loss, platelets release substances that cause blood vessels to contract and close.

What is the use of blood test?

1. Assisted diagnosis of tumors

In clinical practice, various tumor markers can only be used as auxiliary diagnostic indicators, and their screening significance lies in their suggestive role.

2. Check for allergens

Allergy screening tests require only one drop of serum and are characterized by high accuracy. In addition, food intolerance testing is the only means of detecting delayed reactions to food allergies, and the test only requires 1 ml of blood. You can eat normally before blood drawing, no special requirements are required. The test results can show whether the subject is intolerant to a certain food and the degree of intolerance, so the doctor can give correct dietary advice accordingly.

3. Early detection of cardiovascular and cerebrovascular diseases

If the purpose is to prevent cardiovascular and cerebrovascular diseases, the simple blood test should include blood lipids, blood sugar, blood rheology, blood routine tests, etc., and further myocardial enzyme spectrum tests can be done. Myocardial enzyme test is a sensitive indicator of heart disease, and is also a sensitive indicator for early diagnosis of cardiovascular and cerebrovascular diseases, acute myocardial infarction, viral myocarditis, etc.