<s>[INST] hi my name is bree for the past few weeks everytime i lay down i have a lump that sits just near my left rib its a little tender to touch it then moves down to the lower part of my stomach if i breath in ,it then moves up ,im starting to get abit concered what should i do i am 25 years old i have two kids under 4 i have lately been on a diet well just eating right and i weigh about 63kg [/INST] Hi, dearI have gone through your question. I can understand your concern.You may have some mass in breast or some soft tissue tumour. You should go for ultrasound study to know the exact location. If needed go for fine needle aspiration cytology or biopsy of that lump. it will give you exact diagnosis. Then you should take treatment accordingly.Hope I have answered your question, if you have any doubts then contact me at bit.ly/Drsanghvihardik, I will be happy to answer you.Thanks for using health care magic.Wish you a very good health. </s>