When your child has heavy periods.

During the first years, the time between periods may vary. Ovulation does not necessarily occur every month and bleeding may be irregular. However, this does not mean that heavy or prolonged bleeding is harmless. A doctor assesses the amount, duration and how your child feels.

When your child loses a lot of blood, they also lose iron. This can cause iron deficiency and anaemia, sometimes described as a low blood count. Your child may become tired, dizzy, pale or short of breath more easily. Blood tests can check haemoglobin and iron stores.

Heavy bleeding can have several causes. Tell the doctor if your child bruises easily, has frequent nosebleeds or if bleeding problems run in the family. It may be appropriate to investigate whether the blood has difficulty clotting. The amount of bleeding alone does not mean that your child has endometriosis or any particular disease.

Your GP is a good place to start and can refer you onwards if needed. Assessment often begins with a conversation and blood tests. An internal vaginal examination is usually unnecessary in young people with heavy menstrual bleeding. The doctor will assess whether an examination is needed and explain what it involves.

There are treatments with and without hormones. Tranexamic acid may reduce bleeding. Certain anti-inflammatory painkillers, such as ibuprofen or naproxen, can reduce both pain and bleeding. They are unsuitable for some people, including those with certain bleeding disorders. The doctor will assess what is safe for your child.

Hormonal treatment, such as combined contraceptive pills or other hormonal preparations, can also be used for heavy periods once menstruation has begun. There is no general rule that you must wait until periods become regular. The choice depends on your child's health, other medicines and preferences. Progestogen-only pills and other hormonal methods have different effects and may themselves cause irregular bleeding.

Ask for a plan to assess effectiveness, side effects and follow-up. If iron deficiency is confirmed, your child may need iron supplements. Follow the doctor's advice on product and dose. Do not use another person's prescription medicines or copy doses from online comments: age, weight, other conditions and medicines matter.

Some municipalities offer video consultations through a municipal online doctor. This may be an option for non-urgent concerns where physical examination is unnecessary. Parents can book for children according to Helsenorge's rules. An online doctor cannot take blood samples or examine the child physically. If your child is bleeding heavily now and needs urgent help, follow the advice at the top of the page.