I am putting on weight, for no reason, i am not pregnant, nor eating more, i find myself more active. i have 2 children aged 5 and 3.?

Must solve a mystery: When a person "gains weight" for "no reason", the real reason must be found to decide if there is a medical problem going on. The doctor can help find out if there is an endocrine (hormonal) problem, a kidney or heart problem (causes water retention), or a tumor (abdominal tumors can be big & heavy). If no disease is found, then the person is simply needing fewer calories than he or she is eating!

Change in BMR: Basal metabolic rate declines with increasing age and would result in weight gain unless you reduce your caloric intake from when you were younger.