Q: My 5-year-old has a fever and testicular pain after getting the flu vaccine. Should we go to the hospital?
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 5-year-old son received a flu shot yesterday afternoon. Starting early this morning, he developed a fever, and we have been giving him fever-reducing medication. He seems weak, lethargic, and is complaining of pain in his testicles. I'm not sure if this is connected to the vaccine. Should we take him to the doctor or hospital?
Answer:
Testicular pain in a child requires prompt, same-day medical evaluation.
While fever, fatigue, and general body aches are common side effects of the flu vaccine, localized testicular pain is typically unrelated to the vaccination. It is essential to have this evaluated in person to rule out urgent conditions such as testicular torsion, epididymitis, or an inguinal hernia.
Check for the following warning signs:
Is the scrotum or testicle swollen, red, or hard to the touch?
Does one testicle appear higher than the other or look abnormally positioned?
Does he cry out in severe pain when the area is touched?
Is the pain accompanied by lower abdominal pain or repeated vomiting?
When to seek immediate emergency care:
If he experiences sudden and severe testicular pain, persistent vomiting, noticeable swelling, redness, or if the testicle appears firm or abnormally high, take him to the nearest Emergency Room right away. Testicular torsion is a medical emergency that requires immediate intervention.
What to do next:
Even if the pain seems mild and these severe symptoms are not present, do not wait. Take him to your pediatrician or a local urgent care clinic today for a physical examination.
While preparing to go:
Keep him calm and avoid strenuous movement.
Offer small sips of water every few minutes to keep him hydrated.
Bring a record of the vaccine he received, along with the names and doses of any fever reducers you have given him today.
For extra peace of mind and clear guidance when tracking your child's symptoms, the FeverCoach app is always there to help.
