Welcome to HealthCare Magic
I hope you are doing good. It is a bruise
you see , you cant see internal bleeding
in abdomen ( Belly ) or in lungs. Usually Bruises do not appear that quick after trauma it appears after awhile like a day or two. Bleeding in Lungs (Hemothorax
) can be seen Chest x-ray, CT scan
, Pleural fluid analysis , Thoracentesis.
You should re-visit your doctor to completely re-examine has body and if he develops any sign of
Low blood pressure
Pale, cool and clammy skin
Rapid heart rate
Rapid, shallow breathing
Shortness of breath
I hope have answered your query. Feel free to ask.
Wish you good health.