6 diseases that cause sudden weight gain

Unwanted weight gain occurs when you start gaining weight without increasing your intake of food or fluids and without reducing your activity. Many cases of unwanted weight gain are harmless. But some symptoms associated with rapid weight gain should be followed up immediately. Fluid retention is abnormal growth, constipation or pregnancy. Some hormonal changes in middle age can also slow down metabolism and result in weight gain. Unwanted weight gain can be periodic, continuous or rapid. Periodic unwanted weight gain involves regular weight fluctuations.
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