Q: My child has mild chest pain after a sudden car stop. Could it be pneumonia or a muscle strain?

Myeongchan Kim
8 hours ago
3 min read

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:

My child is currently being treated for sinusitis. They had a mild cough, mostly occurring just before bed. Last Saturday, we had chest and nasal X-rays done; the chest was clear, but there was pus in one of the sinuses. My child hasn't had any fever.

However, today my child started touching the middle of their chest and complaining of mild pain, especially when coughing, changing positions, or when the area is pressed. Also, we had a near-miss car accident today where I had to brake suddenly. My child bounced forward and hit their back hard. They didn't hit their chest, but I'm worried this sudden stop might have strained their chest muscles.

Do we need to see a doctor again? Is there any possibility this could be pneumonia?

Answer:

It is completely understandable that you are worried after the sudden stop and your child's new chest pain.

Based on your description—ongoing sinusitis treatment, a normal chest X-ray last week, no fever, a mild cough, and the recent sudden stop causing an impact on the back—here are the most likely causes for the chest pain:

Muscle Strain or Contusion: The sudden braking could have severely tensed the back and chest muscles, or irritated the costal cartilage (where the ribs meet the breastbone). This typically causes pain during movement, coughing, or when pressure is applied to the area.
Postnasal Drip Irritation: Secretions from the sinusitis dripping down the throat can trigger coughing. Repeated coughing, even if mild, can fatigue the muscles around the breastbone.
Pneumonia: Given the normal chest X-ray last week, the lack of fever, and the fact that the cough is not severe, the likelihood of pneumonia is currently very low. However, in rare cases following sudden physical trauma, a pulmonary contusion (lung bruise) can occur, which would require reassessment if breathing difficulties arise.

Things to monitor at home:

Breathing: Watch to ensure your child's chest moves evenly and that they are not gasping or working hard to breathe.
Pain Location: Gently have your child pinpoint the exact location with a finger to see if it's the center breastbone or along the ribs.
Daily Activities: Observe whether they can walk, play, and eat normally.

Home care measures:

Rest: Avoid strenuous activities and have your child rest in a comfortable position (slightly elevating the upper body with pillows can help).
Warm Compress: Apply a warm towel to the painful area for 10–15 minutes to soothe the muscles (be careful to avoid burns).
Hydration: Encourage drinking plenty of warm water to help thin the postnasal drip.
Cough Relief: Maintain indoor humidity between 40–60%. If your child is over 2 years old, a teaspoon of honey can help soothe the throat.

When to seek immediate emergency care (Urgent Care or ER):

Please take your child to be seen immediately if you notice any of the following:

They have difficulty breathing or shortness of breath.
The chest pain progressively worsens or they refuse to move due to pain.
They cry severely or curl up in pain every time they cough.
They refuse to eat or drink, or they appear unusually pale.

Actionable Guidance:

While a muscle strain from the sudden stop is the most highly probable cause, please continue to monitor your child closely. If the chest pain does not improve within 2 to 3 days, or if any new symptoms such as a fever, increased coughing, or breathing difficulties develop, please consult your pediatrician for an in-person evaluation.

For extra peace of mind and clear guidance when tracking your child's symptoms, the FeverCoach app is always there to help.

https://fevercoach.us