It is very difficult to answer this question without being able to see your baby. It may be that he is hungry or on the other hand he may be in pain. He is out of the age group where colic is a problem so this can probably be excluded. He may well be starting with teething which is very common at 4 months. Ask your paediatrician to see him just to be on the safe side if you are concerned. He certainly needs his ears checked for a possible infection if his crying remains excessive.
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.