Diseases Causing Rapid Weight Gain

Weight gain causes several ailments. In some cases, the ailment causes the weight gain. Some individuals have an unexplained weight gain, and no matter how much they struggle, they cannot lose the weight. In many cases, this weight gain can be due to an underlying medical condition.

Feet on a scale (Image: Antonis Liokouras/iStock/Getty Images)


Hypothyroidism is a condition during which your thyroid gland under-produces certain important hormones. The under-production of these hormones results in the slowing down of your metabolism. Other symptoms of hypothyroidism include joint pain, infertility and heart disease. Synthetic hormones are often used to treat hypothyroidism.

Polycystic Ovary Syndrome

PCOS is a common hormonal disorder in women of reproductive age. The condition causes enlargement of the ovaries, with the appearance of multiple cysts. This condition not only causes obesity, but also causes infrequent or prolonged menstrual periods, excess hair growth and acne. The condition is treated with hormonal birth control pills or surgery.

Cushing's Syndrome

Cushing's syndrome is a condition during which your body is over-exposed to the hormone cortisol. This can be a side effect of corticosteroid medications. Acne, slow-healing cuts and an increase in fatty tissue are symptoms of the syndrome, which is treated with surgery, radiation therapy or by reducing steroid medication.

Insulin Resistance

In some cases, your body begins to build up a resistance to the hormone insulin, resulting in a buildup of body fat as well as type 2 diabetes. An increase in insulin-producing cells in the pancreas or a tumor in the pancreas can cause insulin resistance.

Load Comments

Copyright © 2019 Leaf Group Ltd. Use of this web site constitutes acceptance of the LIVESTRONG.COM Terms of Use , Privacy Policy and Copyright Policy . The material appearing on LIVESTRONG.COM is for educational use only. It should not be used as a substitute for professional medical advice, diagnosis or treatment. LIVESTRONG is a registered trademark of the LIVESTRONG Foundation. The LIVESTRONG Foundation and LIVESTRONG.COM do not endorse any of the products or services that are advertised on the web site. Moreover, we do not select every advertiser or advertisement that appears on the web site-many of the advertisements are served by third party advertising companies.