For girls and families
Bleeding before first periods start
Seeing bleeding before first periods can be scary. The good news is that many causes are treatable. This page explains what can be normal, what needs checking, and what to expect at a visit.
Quick definition
This means vaginal bleeding before first periods are expected. In most girls, periods begin later in puberty, usually about two years after breast development starts.
What can be normal at different ages?
Before puberty, ongoing bleeding is usually not expected and should be checked. One exception is newborn babies, who can have a small amount of bleeding in the first week of life.
Helpful timeline: this can make it easier to see what is expected versus what needs review.
First week of life
A little newborn bleeding can happen
This is usually light and settles on its own.
Childhood before puberty
Bleeding is usually not expected
Bleeding at this stage should be assessed to find the cause.
Puberty sequence
First periods usually start later
First periods usually come about two years after breast development begins.
If bleeding happens before this usual pattern, a check helps us work out the cause and the safest next step.
Reassurance: many causes are treatable once identified, and not all bleeding means a serious disease.
When to seek urgent care
- Heavy bleeding, dizziness, fainting, or marked weakness
- Possible deep injury (for example after a fall onto an object or high-pressure water injury)
- Severe tummy or pelvic pain, fever, or your child seems very unwell
- Any genital injury where the cause is unclear
Common causes before first periods
Most causes are not serious once identified. Common reasons include irritation or injury, infection, something in the vagina (such as tissue), skin conditions, and less often early puberty.
Accidental trauma
Straddle injuries are common and usually accidental. Most are minor, but some injuries need urgent review.
Vaginal foreign body
Often causes light or intermittent bleeding, sometimes with discharge or odor. This is a common cause when there is no trauma history.
Infection
Some bacterial infections can cause bleeding, especially if there is yellow/green discharge.
Lichen sclerosus
A skin condition where the vulval skin becomes pale/white, thin, itchy, and sore. The skin can split or bruise easily, so small bleeding spots may happen. It is treatable with specialist creams and follow-up.
Urethral prolapse
This is when soft tissue around the urine opening slips outward and forms a small red or purple ring. It can bleed and may cause stinging or frequent passing of urine. It is treatable once identified.
Less common causes
These include early puberty, thyroid problems, hormone exposure, and very rare growths.
What the assessment usually includes
Step 1
Story and gentle examination
We ask about timing, amount of bleeding, and related symptoms, then do a careful child-friendly exam.
Step 2
Swab tests if needed
If there is discharge, we can test for infection to choose the right treatment.
Step 3
Check for early puberty signs
If needed, we check whether puberty has started too early or if hormone exposure may be involved.
Step 4
Further exam if still unclear
If the cause is still unclear, I may arrange an examination, sometimes under anaesthetic, to look safely and find the cause.
What happens after diagnosis
Treatment depends on the cause and is usually straightforward.
- Infection: treated with the right medicine.
- Foreign body: careful removal usually solves the bleeding.
- Skin causes: creams and follow-up can settle symptoms.
- Early puberty: referral for hormone review if needed.
- Injury: treatment depends on how severe the injury is.
We explain results in plain language and give you a clear plan for next steps.
Goal of care: identify the cause quickly, avoid unnecessary worry, and make sure your child gets the right treatment and follow-up.
Common questions
Frequently asked questions
Can bleeding before first periods ever be normal?
A small amount of bleeding in newborns can be normal in the first week of life. Ongoing bleeding in young girls should be checked.
Does this always mean abuse or cancer?
No. Most causes are not cancer and many are treatable. We still assess safety carefully when needed.
Could it just be an infection?
Yes. Infection is one possible cause, especially if there is discharge or irritation.
What tests are usually needed first?
We usually start with a history and exam. Swabs or other tests are added only if needed.
When should we book if bleeding is light?
Book soon, even for light or occasional bleeding, so we can find the cause early and reassure you.
Still unsure? Bring your observations (timing, amount, associated symptoms), and we can work through this step by step.