The small movable lump on collar bone can be due to the enlarged lymph nodes.The other causes are haematoma
, cyst, lipoma, abscess
You should consult the doctor/surgeon for the physical examination and have the fnac/biopsy
of the swelling done to know the underlying cause.
The oral antibiotics
course of 7-12 days may be prescribed for the infectious cause.The surgical excision may be required in some cases.The treatment depends on the underlying cause.