I have studied your case.
As per your history it looks swelling of soft tissue
which can be venous clot or benign swelling.
As swelling is not reducing I will advise you to further investigate for the cause of swelling.
I will advise you to do MRI
of the swelling.
If its collection or benign mass it can be excised.
So you may need blood investigation.
Hope this answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your queries.
Wishing you good health.