Irregular periods can be caused by various factors including hormonal imbalances, stress, changes in weight, and medical conditions such as polycystic ovary syndrome (PCOS). While irregular periods themselves may not cause weight gain, the underlying causes of irregular periods can lead to weight gain. Quite often, the weight gain in itself might lead to irregular periods by causing hormonal imbalances.
For example, hormonal imbalances can cause weight gain or difficulty losing weight. High levels of insulin can occur in conditions such as PCOS and contribute to weight gain.
It's important to note that weight gain can also be caused by factors unrelated to irregular periods, such as poor diet, lack of exercise, and certain medications. If you are concerned about weight gain or irregular periods, it's best to talk to a healthcare provider who can evaluate your individual situation and recommend appropriate treatment or lifestyle changes.