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Fussiness, mild fever, and gas after some vaccines are common. Moms use paracetamol and gas drops only on their pediatrician’s advice, plus lots of cuddles and contact naps for comfort.
⚠️ Caution:Seek medical help if fever is high/persistent, baby is very sleepy or difficult to wake, has breathing issues, or you notice unusual swelling/rash.
Parents worry vaccines ‘messed up sleep’ or baby is in pain. Moms often say 24–48 hours of fussiness is common and comfort measures help—but red flags should be checked quickly.
Here's what moms in our community shared based on their own experience.
Moms shared that vaccines can make babies feel feverish or sore at the injection site, so they become clingier and want more contact naps.
Some moms give paracetamol (Calpol/Dolo) after vaccines only if their pediatrician has prescribed it, which helps babies settle and sleep better.
A few moms were told by their pediatrician to also give gas drops or colic medicine after rotavirus shots because gas and tummy discomfort can be a side effect.
In US-style advice, parents are usually told to monitor temperature, feed on demand, and call the pediatrician before giving any medication, especially in very young babies.
Fussiness, drowsiness, more sleep, reduced feeding and low-grade fever after a vaccine are common and usually settle in 1-3 days (sometimes up to 4-5). Watch that the baby is feeding and peeing well; if it doesn't improve, see the doctor.
Ask your doctor about giving Calpol/Crocin (paracetamol) for relief - e.g. Crocin 0.7ml, or Calpol every 6 hours until fever subsides. Some doctors suggest paracetamol twice a day after vaccination to avoid discomfort.
If the baby cries when moving the legs (injection-site pain), swaddling can help by restricting leg movement.
Rub ice frequently over the injection site - there may be a knot forming, and ice prevents or removes it; the pain goes with the knot. Some moms used Thrombophob ointment around the area 2-3 times daily.
Asking for painless (acellular) injections can reduce post-vaccine pain.
When giving Crocin after the vaccine, some paeds suggest pairing it with a colic aid because of the gas that can follow.
Some fussiness around this age could also be a 6-week growth spurt rather than the vaccine.
The information shared on this page comes from real experiences of mothers in our community. While we strive to provide helpful insights, this content is for informational purposes only and should not be considered medical advice. Always consult with your pediatrician, healthcare provider, or other qualified medical professional for any questions regarding your child's health or development.
Last reviewed: January 12, 2026
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