This is very unlikely to be an ingrowing toe nail at his age. You need to make a proper diagnosis here, so please take him to see your paediatrician.
The information provided does not constitute a diagnosis of your condition. You should consult a medical practitioner or other appropriate health care professional for a physical exmanication, diagnosis and formal
advice. Health24 and the expert accept no responsibility or liability for any damage or personal harm you may suffer resulting from making use of this content.