Q: Can a hard bump on the head cause a temporary bald spot in a 4-year-old?
Updated: 2 days ago
Medically reviewed by Sang Hyun Ahn, MD
Content edited by Myeongchan Kim, MD
This post is a dramatization of a question and answer session experienced by our actual medical reviewers. Please note that this content is for informational purposes only and does not constitute medical advice. Always consult with a qualified healthcare professional for any health concerns or before making any decisions related to your health or treatment.
Question:
Hello! About two weeks ago, my 4-year-old child was playing under a counter and suddenly stood up, hitting their head hard on the edge. There was no bleeding, just a very slight bump. Afterward, the area turned light pink, and today I noticed a small bald spot about half the size of a pinky nail in that exact spot. Can a hard bump cause a temporary bald spot like this?
Answer:
It is completely understandable that you are worried about the area turning light pink and developing a small bald spot after a head injury.
Current Situation
Developing a small bald spot about two weeks after a strong impact is likely a case of traumatic alopecia. When the scalp sustains a hard bump, the hair follicles can be temporarily damaged or inflamed by the impact, which can cause the hair in that specific area to fall out.
Home Care Instructions
• Do not let your child scratch or rub the affected area.
• Wash the hair as usual with a mild, gentle shampoo (no special hair products are necessary).
• Avoid putting pressure on the area with tight hats or headbands.
• Take a clear photo of the spot now so you can easily track any changes in its size over time.
When to Visit a Pediatrician
Please seek an in-person medical evaluation if you notice any of the following:
• The bald spot spreads rapidly (e.g., doubles in size within a week).
• The area develops oozing, crusting, severe swelling, or a foul odor (signs of infection).
• New bald spots begin to appear in other areas of the scalp.
• Your child develops a new headache, vomiting, or unusual behavioral changes (these would be new symptoms appearing now, not right after the initial bump).
General Outlook
Traumatic alopecia typically resolves on its own, and the hair usually regrows naturally within 3 to 6 months. As long as the scalp skin itself appears healthy and there are no signs of infection, closely observing the area at home is often sufficient. However, if the spot continues to grow, if you notice any concerning signs, or if you simply need peace of mind, please consult your pediatrician for a proper examination.
For extra peace of mind and clear guidance when tracking your child's symptoms, the FeverCoach app is always there to help.
