Rafsan, your mother does need to get medical attention as soon as possible. As women, we know the severity of Breast Cancer. There are different types, some can spread rapidly without one even knowing. My mother's doctor just recently found a lump and turns out it is cancerous. I am not trying to scare you, but you do need to be aware of the high risk that women have of getting Breast Cancer. I would seek immediate medical attention.. They will preform a mamogram and then futher details will be stated. Thank you for your question, I am always free for any further questions you may have.
I wouldn't get overly concerned about the lump being cancer until she has a doctor take a look at it. It could be something really minor. Take care and God Bless you.