Mild redness and swelling of the penis in a 3-year-old is commonly due to local irritation, insect bite, minor trauma, or early balanitis. Since your child is otherwise active and is passing urine normally, it is less likely to be an emergency. Keep the area clean and dry, avoid forceful retraction of the foreskin, and wash gently with lukewarm water only. Do not apply any medicated cream unless advised after examination. If the redness or swelling increases, fever develops, pus appears, or he has pain or difficulty while passing urine, he should be examined by a pediatrician promptly.
Next Steps
Observe for the next 24 hours. If symptoms persist or worsen, consult a pediatrician for examination and treatment.
Health Tips
Maintain good genital hygiene, avoid irritants such as scented soaps, and ensure the diaper area remains dry. Seek urgent medical care if your child is unable to pass urine or develops severe swelling or increasing pain.