Most breast lumps (90%) aren’t cancerous, but it’s always best to have them checked by your doctor.
You should see your doctor if you notice any of the following:
Breast pain isn’t usually a symptom of breast cancer.
It’s important to be breast aware, so you can pick up any changes as soon as possible. Get to know what is normal for you. For instance, your breasts may look or feel different at different times of your life. This will make it much easier to spot potential problems.
Read More ON:
Breast Lumps
Causes of Breast Lumps
Diagnosing Breast Lump
Treating Breast Lump
Breast Cancer
Symptoms of Breast Cancer in Men
Causes of Breast Cancer
Diagnosing Breast Cancer
Treating Breast Cancer
Preventing Breast Cancer
Living with Breast Cancer
Breast Cancer Screening
Source: NHS UK
http://www.nhs.uk/Conditions/Cancer-of-the-breast-female/Pages/Symptoms.aspx