Could my breast cancer have been caused by the unhealthy environment i lived in for two years? small lump started before i moved from the apartment, and now its the size of my palm (red and irritated too) it started 9 months ago. no history of any cancer

Not likely.: One factor is family history of this disease, like if a sister and mother also had it. These cancers are hormone dependent, so early menarche, late menopause, and late/no term pregnancies are at increased risk. Dietary fat intake may also be a risk factor. But the environment you lived in is highly unlikely to have done this. More likely is that you should've seen your dr. So see dr. Asap.

UnRx'd Cancer Grows: While it is true that as many as 90% of all breast cancers are environmental in origin, it is difficult if not impossible to identify the specific cause of your cancer. Regardless, once diagnosed, breast cancer is eminently treatable. Left untreated, it will continue to grow. Please seek out medical care if you haven't already done so. Good luck.

Cancer: Do you have an actual diagnosis of breast cancer from a biopsy? Or are you describing what you see and feel? Breast infection can be firm tender and red. But the rare condition of an inflammatory breast cancer can be a serious condition. Environmental conditions do not cause sudden cancer formation, but infections can be related to unclean situations.