32 years old female, no children, experiencing burning sensation in the left breast *only* when it's pressed or rubbed since 1 week. That sensation lasts for about 3-5 seconds and subsides on its own. It is not pain but burning sensation. No tenderness. No change in skin texture or colour, no lumps, no dimpling, no inverted nipple or no discharge. Is it something that requires immediate attention? Please help. Thank you.