Hi
If the swelling size increases during crying then it is most probably hernia
If the swelling is of same size most probably granuloma
Granuloma is reddish polyp like does not increase in size
By the picture It looks like umbilical hernia
It is physiological and it will be of no issues
Next Steps
Most umblical hernias resolves within 2years
Health Tips
Kindly consult a paediatrician to get opinion