I have studied your case with diligence.
As per your symptoms there was no history of any injury
, and swelling is seen over blood vessel in this case possibility of haemangioma is suspected.
There can be internal fibrosis
leading to indentation.
MRI will help in diagnosis.
Till time you can do physiotherapy
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.