What Causes A Lump In The Armpit?
It could be enlarged lymph node.
Detailed Answer:
Hi
As per your description,it looks like an enlarged lymphnode.It is enlarged most commonly due to infection.I prescribe Antibiotic like Cefuroxime 500mg twice daily and Anti inflammatory tablet to my patients with similar complaints.
If there is no response even after 2 weeks ,i will go for FNAC(Fine needle aspiration cytology) of the swelling.Nature of the swelling can be known.
Another possibility is Lipoma of axilla which arises from fat tissue.
FNAC will differentiate these two.If FNAC is inconclusive,then BIOPSY has to be done where the entire swelling is removed and sent for histopathological examination.
Hope i answered your query.If you have any questions,i will clarify further.
Wish you good health.
Regards