For Kids: When Someone You Love Has Cancer If someone you love has cancer, you probably feel sad, angry, and confused. It's OK to feel this way. Cancer is a serious disease. Your loved one is sick. He or she will need to see the doctor a lot. It can help to learn more about cancer. For Teens: What to Expect If Your Loved One Has Cancer If you are curious about your loved one's treatment, you may want to ask if you can go with them to a clinic visit or any of the other appointments they may have. Your loved one may not want you to come, or he or she may be happy that you're interested.