That is a lot of weight to gain in such a short time. Have you had a medical exam recently?? Your feet might hurt as they are not used to the new weight change,. If you are sure it is not eating that is causing it, I would get checked for it. It could be fluid retention and that is not good.
Unintentional weight gain can be caused by many different things.
As you age, our metabolism slows down. This can cause weight gain if you eat too much, eat the wrong foods, or do not get enough exercise.
A medical problem or use of certain medication may also make you gain weight.
Medications that can cause weight gain include corticosteroids and drugs used to treat bipolar disorder, schizophrenia, and depression.
Hormone changes can also cause unintentional weight gain. This may be due to:
Hypothyroidism (underactive thyroid, or low thyroid)
Polycystic ovary syndrome
Bloating, or swelling due to a buildup of fluid in the tissues can cause weight gain. This may occur with menstruation, heart or kidney failure, preeclampsia, or certain medications.
get help if:
Contact your health care provider if the following symptoms occur along with the weight gain:
Excessive weight gain without a known cause
Sensitivity to cold
Swollen feet and shortness of breath
Uncontrollable hunger accompanied by palpitations, tremor, and sweating