What should I do if I feel dizzy, lightheaded, and break out in cold sweats after having blood drawn?
May 15, 2023
Source: Cainiu Health
Dr. Yang Jun
Introduction
Dizziness, vertigo, and cold sweats after blood drawing may be related to factors such as emotional tension, hypoglycemia, and fluid loss. These symptoms can be alleviated by diverting attention, replenishing sugar, and restoring fluids. Most people may feel nervous or fearful about blood tests, and such anxiety or panic can cause abnormal dilation of blood vessels.
Dizziness, vertigo, and cold sweating after blood collection may be related to factors such as emotional tension, hypoglycemia, and fluid loss. These symptoms can be relieved by diverting attention, replenishing sugar, and increasing fluid intake. The specific analysis is as follows:
1. Emotional tension
Many individuals may feel nervous or fearful about blood drawing. Such anxiety or panic can cause abnormal dilation of blood vessels, leading to symptoms such as dizziness, weakness in limbs, and cold sweats. It is recommended to listen to music or talk with others after blood collection to divert attention, which can effectively alleviate these symptoms.
2. Hypoglycemia
Most blood tests require patients to fast beforehand. Prolonged fasting may lead to decreased glucose levels in the blood, resulting in symptoms of hypoglycemia such as dizziness, anxiety, palpitations, and tremors. After blood collection, consuming sugary foods such as candy or chocolate can help restore blood glucose levels and relieve discomfort.
3. Fluid loss
During blood collection, some blood may leak out or infiltrate into surrounding tissues, causing a loss of body fluids. In this case, it is advisable to increase fluid intake appropriately after the procedure to maintain the body's fluid balance.
In addition to the above common causes, symptoms may also be associated with low blood pressure, anemia, or vascular spasm. Treatment and relief methods vary depending on the underlying cause. If symptoms are severe after blood collection and do not improve with appropriate rest, it is important to promptly inform a doctor. Follow medical advice for proper evaluation and management after the cause has been identified.
