The rise in blood sugar after eating is why people who feel dizzy before eating often feel better afterward. When blood sugar drops following a meal and causes dizziness after eating, doctors call it reactive hypoglycemia. People with diabetes or prediabetes may experience blood glucose drops after a meal because their body produces too much insulin.
However, people without diabetes can get this type of hypoglycemia too. For example, people who have had stomach surgery may digest foods too quickly, making it harder for the body to absorb glucose from them. Rare deficiencies of certain digestive enzymes can also lower blood glucose. A doctor can use tests to identify diabetes in people with the condition and prediabetes in those at risk. Eating smaller, more frequent meals with lower sugar content may also help people who experience dizziness after eating because of low blood sugar.
Doctors call this postprandial hypotension. People with high blood pressure are more likely to develop this symptom because high blood pressure can cause hardening and blockages in the arteries.
These changes make it more difficult for blood to flow to the brain when it is also flowing to the digestive system. Reduced blood flow to the brain can result in dizziness. In many cases, treating high blood pressure can help. Drinking more water before meals and eating more frequent but smaller meals, for example, six small meals instead of three large ones, may also improve symptoms.
Some diabetes medications , including insulin , may cause dizziness when they lower blood glucose too much. A person who takes their medication right before a meal may notice post-meal dizziness as the medication takes effect. People with diabetes who regularly experience dizziness after a meal should talk to their doctor about changing their medication, taking a lower dosage, or adjusting their meal schedule. Food sensitivities may cause some people to feel light-headed or nauseous.
Certain drugs and chemicals, including caffeine and alcohol, may also cause dizziness after a meal. People who frequently experience dizziness after eating may wish to consider keeping a log of these episodes and noting what they eat before each one.
But you should consult your doctor if such episodes recur or if you have passed out. Low blood sugar levels due to lack of food at the proper time is a possible cause of feeling faint. Anyone can develop hypoglycaemia, but it is most common when associated with treatment of diabetes. Low blood glucose level can result from over treatment with insulin or oral antidiabetic agents, from insufficient food intake, or from too much exercise without proper food intake.
But hypoglycaemia symptoms can also occur in people without diabetes. The early symptoms of a low or falling blood glucose level may include hunger, trembling, weakness, sweating, confusion, irritability, acute nervousness, and tingling of the mouth and fingers.
What actually happens is that the body senses the dropping glucose level and tries to bring it back up by releasing hormones such as glucagon from the pancreas and epinephrine adrenaline to trigger the release of glucose from glycogen the glucose storage form in the liver and muscles.
Adrenaline is secreted as part of the "flight or fight" mechanism, which prepares the body to take emergency measures. Then one feels shaking, sweaty, and nervous. These symptoms are due to the secreted adrenaline and are not produced directly by the glucose levels alone. Reactive hypoglycaemia: It is the development of low sugar three to five hours after a meal. Patients with reactive hypoglycaemia usually have mild hyperglycaemia high sugar immediately after meals and develop symptoms of hypoglycaemia three to five hours after the meal.
It was suggested that the initial hyperglycaemia provokes a gradual increase in insulin secretion, which may persist after the disposal of the ingested glucose, leading to the late hypoglycaemia. Starting a new diet can be overwhelming enough without having to deal with worrisome symptoms like lightheadedness. In most cases, lightheadedness can be remedied with some tweaks to your eating plan, but sometimes it can indicate an underlying health condition.
Extreme calorie restriction can not only stall long-term weight loss, but it can also cause lightheadedness, hunger, irritability and anxiety. Not eating enough calories can also lead to nutritional deficiencies like anemia, bone loss, decreased immune function and infertility.
Create a personalised content profile. Measure ad performance. Select basic ads. Create a personalised ads profile. Select personalised ads. Apply market research to generate audience insights. Measure content performance. Develop and improve products. List of Partners vendors. Dizziness is a general term that can be used to describe more than one feeling.
Some people will say they are dizzy when they are feeling lightheaded, "floaty" or as if they might lose consciousness. Some people say they feel dizzy because the room seems to be spinning around.
The latter condition is probably more accurately defined as vertigo. The sensation of feeling dizzy can be caused by multiple different conditions, but keep in mind that it would be impossible to cover all the different causes of dizziness, and what causes one person to become dizzy may not cause dizziness in others. Dizziness usually stems from a problem in one of the following body systems:. Dizziness can occur in other ways but the cause can usually be grouped into one of the above categories.
More specific circulatory conditions that can cause dizziness include pregnancy, dehydration or standing up too quickly called orthostatic hypotension, a condition that is more common among the elderly and those taking certain medications. A drop in blood pressure caused by a medication can cause dizziness, and so can internal bleeding. Neurological conditions that can cause dizziness include chronic illnesses, such as multiple sclerosis, or head or spinal cord injuries.
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