If you have a bad lifestyle and eating habits, expect to gain weight over a few months. The increase in weight will happen over an extended time. However, it is possible to gain weight in a reasonably short time even if you are maintaining an active lifestyle. One of the leading causes of such weight changes is hormonal imbalances.
Your body is a wondrous biological structure. The miraculous thing about it is getting all the processes to work harmoniously to maintain and sustain each other. One aspect that is essential to how your body works is your hormones.