Possible Risks of a Blood Test:

* Bleeding and bruising: Can be minimized by applying firm pressure after needle removal.
* Pain: Usually minor and short-lived.
* Infection: Rare.

Additional Precautions:

* Avoid having blood drawn from an arm with swelling or edema.
* Notify the healthcare professional if you feel dizzy during the procedure.
* Discuss any concerns regarding potential risks with your healthcare provider.

Potential Causes of False Blood Test Results:

* mishandling of the sample by the laboratory assistant
* 服用避孕药或雌激素药物
* Improper specimen handling

Factors Affecting Blood Test Results:

* Drugs: Certain medications can influence test results.
* Foods and beverages: Some substances can affect blood component levels.
* Stress levels: Stress can impact hormone levels.
* Time of day: Blood test results can vary depending on the time of day.

It's important to consult with a healthcare professional to interpret blood test results and discuss any potential health concerns. False results can occur due to various factors, so retesting may be recommended if necessary.