How To Treat Blood Clot At The Site Of Pentavac Injection?

My baby took pentavac injection for 14 weeks.It is his second dose.First dose we had no problem except pain and fever. But to the contrary during second dose he faced a. Large clot adjacent to the injected spot measuring 3 cm and width up to 1cm and also a clot of diameter 8mm at the injected spot.
We tried for thrombophobointment, mupriomycin ointment as well as aloe Vera cream.But till it remains.One mont over but the clot does not disappears.pl suggest any treatment.My baby isis now five months old.Girija,Mother