After surgery,he has developed swelling extending from breasts to the surgery area.
It is big one.
Most probably,blood vessel got injured and there could be bleeding in the layers beneath the skin.
As Mesh is placed in Hernia repair
,it might have caused some reaction and lead to the swelling.
Please do not waste time.
Consult your nearest doctor and get him examined.
examination will confirm the diagnosis.
Till then,give him antibiotic,anti inflammatory drug.
Wish him speedy recovery