Pain in right chest bone below breast. Looks like a lump. Kindly suggest.

Atypical chestpain. Right sided chest pain most probably not from the heart. If associated with a lump may be localized infection, inflammation, hernia or could be muscular pain. Physical exam would help to narrow down the diagnosis.
See your doctor. See your doctor to be evaluated and have Xray/CT and if is a mass to have biopsy /resection of mass.