During puberty, many changes occur in the body, including hormonal shifts that can affect various systems, including the gastrointestinal system. It's not uncommon for some individuals to experience changes in bowel habits during this time. These changes can include alterations in the frequency or consistency of bowel movements.
However, it's important to note that changes in bowel habits can also be influenced by other factors such as diet, exercise, stress, and hydration. If a young person is experiencing significant changes in bowel habits that are concerning, persist, or are accompanied by other symptoms (such as pain, blood in stools, or weight loss), it would be advisable to consult a healthcare professional to rule out any underlying issues.