Feeling dizzy and nauseous after blood draw
Mar 28, 2023
Source: Cainiu Health
Dr. Yang Jun
Introduction
Dizziness and nausea after blood drawing are generally caused by both normal physiological responses and pathological conditions, such as hypoglycemia or insufficient cerebral blood supply. Treatment should be carried out under a doctor's guidance through general management and oral medications. Medications such as apixaban tablets or aspirin tablets may be prescribed under medical supervision. After blood collection, it is advisable to consume moderate amounts of foods that help replenish blood and vital energy, such as animal liver and red dates.
Dizziness and nausea after blood drawing are generally caused by both normal and pathological factors, such as hypoglycemia or insufficient cerebral blood supply. Treatment may involve general care or oral medications under a doctor's guidance.
1. Normal Phenomenon
Dizziness and nausea following blood collection may result from needle phobia. Patients with needle fear often experience anxiety and fear during blood draws, which in severe cases can lead to fainting. However, this usually lasts only a short time and resolves within about two minutes. No special treatment is typically required—simply relaxing the mind is sufficient.
2. Pathological Phenomena
1) Hypoglycemia
If a person already has hypoglycemia, symptoms such as dizziness and nausea may occur after fasting blood collection. Immediate rest and consuming food can effectively relieve these symptoms.
2) Insufficient Cerebral Blood Supply
If a large volume of blood is drawn, reduced circulating blood volume may lead to inadequate blood flow to the brain, resulting in symptoms like nausea and dizziness. In severe cases, medications such as apixaban tablets or aspirin tablets should be taken orally under medical supervision.
Besides the above, it is also helpful after blood drawing to eat moderate amounts of foods that replenish qi and blood, such as animal liver, red dates, etc.
