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1.The most possible cause of lump in the bilateral axillary region are lymph nodal mass lesions.
2.Lymph nodal enlargement is seen in case of any infection / inflammation, which can be localised or systemic.
3.First thing would suggest to get an
ultrasound of breast and both axillary regions. Ultrasound will assess the nature of the lump,its source and extensions.
4.That will evaluate any possible cause in the breast or just
lymphadenopathy. An FNAC - fine needle aspiration cytology to evaluate the nature of the cells.
5.Sugget to see your GP and get examined,investigated and treated accordingly.
Good luck.
Hope i have answered your query,
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