There are three main types of kyphosis: postural, Scheuermann's, and congenital. Postural kyphosis is most common and results from poor posture, while Scheuermann's has genetic factors and congenital kyphosis occurs during fetal development. Symptoms include back pain, fatigue, and difficulty breathing. Treatment involves braces, exercises, medication, and potentially surgery for more severe cases. Maintaining good posture can help prevent worsening of kyphosis.