Thanks for writing to Healthcare magic,
I have studied your case,
These can be hematoma
collection post operative, you need strict limb elevation ,if hematoma is very tense you may need to aspirate fluid.
Check for symptoms of infection like fever
to adhesive tape can also lead to such symptom but they are usually localized.
Consult your operating surgeon for management.
Hope I have answered your query. Let me know if I can assist you further.