Sciatica is defined as the group of symptoms linked to irritation of the sciatic nerve. These pains may occur during a compression at the root (on the lumbar spine), as in the case of a herniated disc.
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Breast cancer: This is a malignant tumour made up of many cancerous cells. It should be noted that breast cancer is not the most common cause of breast pain, as patients of this disease are often asymptomatic.