Hello dear,
The cut wound needs to be cleaned properly with regular dressing & a course of prophylactic antibiotics to prevent secondary infection.
The swelling in the shin after
injury is due to accumulation of fluid & blood and it is called
Hematoma.
The blood cells accumulated are eventually broken down and absorbed in the body.
But this is a slow process & takes times to disappear completely.
Till that time, symptomatic relief is obtained by analgesics preparations (like paracetamol/
ibuprofen)+
serratiopeptidase, ice compression & adequate rest.
If it still persists or there are any other associated symptoms like
fever, loss of sensation, etc...then it will be better to consult your Doctor.
Under such circumstances, a proper clinical+ radiological evaluation will be needed to rule out any pathological cause for symptoms.
Till then, maintain adequate hydration & nutrition status.
There is no need to worry, you will be fine.
Wishing you a good health.
Take care