The danger of severe obesity

High Blood Pressure

Persistently elevated blood pressure, or hypertension, is much more common in people who are obese. Hypertension can lead to the development of heart disease, kidney disease, stroke, and arterial blockage.

Heart Disease

Heart disease, including heart attack and congestive heart failure, is six times more likely in obese persons. In fact, severely obese persons have 40 times the risk of dying suddenly from a heart attack, as compared to the non-obese.

High Cholesterol Levels

Obesity contributes to high blood cholesterol levels and thus to a higher incidence of heart disease and high blood pressure.


Diabetes mellitus, specifically adult-onset or type II diabetes, is ten times more common in people who are obese. Persistently elevated blood sugar causes tissue damage throughout the body, leading to kidney failure, blindness, heart attack, stroke, and arterial blockage in the legs which can result in amputation.

Respiratory Problems

People who are overweight often feel "winded" after slight physical exertion and need to stop and catch their breath. This is caused by a heavier-than-normal chest wall, which makes full expansion of the lungs more difficult. Any activity that requires a greater demand for oxygen will result in shortness of breath. Exercise or even daily activities, such as climbing stairs, housework, or running to catch a train, become difficult to perform.

The major breathing problems caused by severe obesity are sleep apnea syndrome and obesity hypoventilation syndrome. Sleep apnea is when a person stops breathing temporarily during sleep. In an overweight person, this is caused by fat compressing the neck and blocking the windpipe, which causes loud snoring and periods of "not breathing". This results in poor quality and restless sleep due to the lack of oxygen and, subsequently, to daytime drowsiness. Most people are unaware that they have this problem, but the health effects can be devastating, including heart rhythm disturbances and even sudden death.

Gastroesophageal Reflux

Acid reflux, or heartburn, is common in obese persons for several reasons. Acid in the stomach is normally prevented from going back up the esophagus, or swallowing tube, by a valve. The valve can be overcome by increased pressure in the stomach, the result of consuming a large meal. A heavy belly only aggravates this condition. Consequently, food and acid can wash back up into the esophagus, causing a burning sensation. In severe cases, the food and acid can reach all the way up into the wind-pipe (trachea) and be inhaled, which can result in severe pneumonia or lung injury.

Urinary Stress Incontinence

Many obese women experience urinary stress incontinence. This typically can occur when the bladder valve is overcome by the pressure of a heavy belly pressing against the bladder, combined with increased pressure from a cough, sneeze or laugh.

Degenerative Arthritis

Obesity can accelerate wear and tear of the lower back and weight-bearing joints (hips, knees, ankles, feet), leading to degenerative arthritis. Arthritis in the lower back can lead to nerve compression and chronic pain. Arthritis in the joints can cause problems with walking, and may eventually require joint replacement surgery. However, many orthopedic surgeons refuse to perform surgery in severely overweight patients, until they lose much of their weight.

Venous Stasis Disease/Ulcers

The veins of the legs can carry blood back to the heart against gravity because they have one-way valves. These valves are more likely to breakdown as resistance against the blood increases, which is what happens as the abdomen grows heavier and heavier. When the valves fail, the legs become swollen and discolored and may even develop ulcers. Venous disease can be debilitating and rarely improves without weight loss.


Studies have shown that overweight women have a higher risk of cancer of the breast, uterus, and ovaries. Obese men have a higher risk of having esophageal, colon and prostate cancer.

Skin Infections

Many overweight persons have skin that folds over on itself. The areas within the creases can become irritated from sweating and chafing, often leading to infections despite frequent bathing, and causes pain and discomfort. Skin cuts created from bra straps can also cause pain and become infected.


The excess fat in women plays a significant role in changing the levels of estrogen and progesterone, resulting in irregular menstrual cycles and infertility. This can be reversed once weight loss is achieved. In fact, women who lose weight should take birth-control precautions if pregnancy is not desired.

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