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Doctor insights on: What Is Causing My Lightheadedness Happens After Big Meal

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What is causing my lightheadedness? Happens after big meal

What is causing my lightheadedness? Happens after big meal

A belly full: Large meals cause a diversion of circulation to the gastrointestinal tract to aid digestive processes. Blood sugar can rapidly rise. Blood pressure occasionally shifts. In cardiac disease, circulatory volume and blood pressure changes may responsible. People with glucose intolerance (not just diabetics) may become symptomatic with rapid rise in blood sugar. ...Read more

Dr. Dariush Saghafi
1,005 doctors shared insights

Lightheadedness (Definition)

Lightheadedness is a sensation of feeling faint or "light in the head". It may be a symptom of Low blood pressure, or hypotension, which occurs when blood pressure during and after each heartbeat is much lower than usual. It may also occur when you are dehydrated, as my happen when severe morning ...Read more


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Can eating one meal a day cause weakness or dizziness/lightheadedness?

Can eating one meal a day cause weakness or dizziness/lightheadedness?

Expected: Human is not made to eat just one meal a day and thus you are subjecting yourself to bouts of hypoglycemia when without food for a long time , thus the weakness and dizziness you need to eat at least 3 meals a day. They need not be large, just enough to cover your energy need. ...Read more

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I've been feeling minor lightheadedness and back pain for around 30 hours. I've had full meals and plenty of rest. Any probable causes?

I've been feeling minor lightheadedness and back pain for around 30 hours. I've had full meals and plenty of rest. Any probable causes?

Many reasons: Lightheadedness after standing up can be due to orthostatic hypotension if your resting BP is too low or you're dehydrated. It can also occur due to bradycardia, or slowing of the heart rate (HR). You could also have some vasovagal component. See your primary care physician immediately for guidance. http://www.webmd.com/a-to-z-guides/hypotension-orthostatic ...Read more

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Can dysautonomia cause tachycardia (up to 185) and lightheadedness after eating heavier meals?

Can dysautonomia cause tachycardia (up to 185) and lightheadedness after eating heavier meals?

Not normally: Tachycardia is not normally associated with meals. Dysautonomia related to digestion and eating is bloating, indigestion, and intolerance of larger meals. Tachycardia in dysautonomia is more often related to standing after lying down - orthostatic hypotension. ...Read more

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My whole body "rocks" or sways to my heart beat with every beat? Can this be normal. It's worse after a big meal. Causes?

My whole body "rocks" or sways to my heart beat with every beat? Can this be normal.  It's worse after a big meal. Causes?

Heart pounds: This could be related to increased cardiac awareness related to psychological issues but there are cardiac, hormonal conditions and drugs that may cause this sensation. Need workup to further evaluate this symptom. ...Read more

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What else could cause cavities in between teeth, if you floss, brush&and use act. I do not snack and only drink water and milk with one big meal a day?

What else could cause cavities in between teeth, if you floss, brush&and use act. I do not snack and only drink water and milk with one big meal a day?

Bacteria/genetics: You could have a more aggressive strain of the bacteria that cause cavities, known as streptococcus mutans. You could also have more acidic saliva, or even enamel that is weak due to genetics. I would suggest having a bacterial atp test and an oral ph test to see if the bacteria is the root cause. ...Read more

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I woke up & my stomach was burning near top had gas usin bathrm & feel nauseous. What is causin this & what cn i take. Ate big meal & wnt 2 bed last n?

I woke up & my stomach was burning near top had gas usin bathrm & feel nauseous. What is causin this & what cn i take. Ate big meal & wnt 2 bed last n?

Reflux into esoph: The swallowing tube (esophagus) enters the stomach below the lower breast bone. Sometimes food and acid washes back into the esophagus after entering the stomach. The result is burning and gas (belching) and perhaps nausea. Gravity plays a role in this and remaining upright until stomach empties prevents it. Antacids generally provide relief. ...Read more

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My belly is rumbling and making noises but ive just eaten a big meal so im not hungry. What could this be? Could being led down be causing this?

My belly is rumbling and making noises but ive just eaten a big meal so im not hungry. What could this be? Could being led down be causing this?

Digestion: You can have sounds from your stomach after a meal and this is a normal part of digestion. Lying down after a meal may make it more likely that you would hear this than if you were up moving around. ...Read more

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Bloated upper stomach and a lot of gas since I ate a pretty heavy meal 12 hours ago. What could cause this?

Bloated upper stomach and a lot of gas since I ate a pretty heavy meal 12 hours ago. What could cause this?

Several causes: Possible causes of this problem include overeating, eating rich and fatty foods and eating too fast. Certain foods such as beans, dairy products and even whole grains can cause this problem. Temporary bloating is not unusual but if the problem persists I suggests a routine check up. ...Read more