Hello dear,
The pain in knee & shin can be attributed to the trauma induced due to fall from stairs.
According to the history as posted, the swelling can be attributed to accumulation of fluid or blood (
hematoma) due to inflammatory response of the body.
The pain and swelling will gradually decrease as the inflammatory response subsides.
But this is a slow process & takes times to disappear completely.
Symptomatic relief can be obtained by taking analgesics, anti inflammatory medications, muscle relaxants, ice compression & adequate rest.
However, if the symptoms still persist or aggravate, then it will be better to consult an Orthopedician and get a proper physical examination done.
Investigation like
X ray of the right leg and knee joint will be helpful to rule out any
injury to bone or
soft tissue.
Wishing you a good health.
Take care.
You can ask me a direct query on this website using the below link: http://www.healthcaremagic.com/doctors/dr-polash-sannigrahi/64925