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Unintentional weight gain is when you gain weight without trying to do so and you are not eating or drinking more.
Causes
Gaining weight when you are not trying to do so can have many causes.
Metabolism slows down as you age. This can cause weight gain if you eat too much, eat the wrong foods, or do not get enough exercise.
Drugs that can cause weight gain include:
Birth control pills
Corticosteroids
Some drugs used to treat bipolar disorder, schizophrenia, and depression
Some drugs used to treat diabetes
Hormone changes or medical problems can also cause unintentional weight gain. This may be due to:
Cushing syndrome
Underactive thyroid, or low thyroid (Hypothyroidism)
Polycystic ovary syndrome
Menopause
Pregnancy
Bloating, or swelling due to a buildup of fluid in the tissues can cause weight gain. This may be due to menstruation, heart or kidney failure, preeclampsia, or medicines you take. A rapid weight gain may be a sign of dangerous fluid retention.
If you quit smoking, you might gain weight. Most people who quit smoking gain 4 - 10 pounds in the first 6 months after quitting. Some gain as much as 25 - 30 pounds. This weight gain is not simply due to eating more.
Home Care
A healthy diet and exercise program can help you manage your weight. Talk to your health care provider or a dietitian about how to make a healthy eating plan and set realistic weight goals.
Do not stop any medicines that may be causing the weight gain without talking with your health care provider.
When to Contact a Medical Professional
Contact your health care provider if you have the following symptoms with the weight gain: