Understanding the causes of breast pain

By
St George's Hospital, The Princess Grace Hospital
Published January 31st, 2012  |  Last updated June 17th, 2014

Breast pain is extremely common and is rarely caused by cancerAbnormal, uncontrolled cell division resulting in a malignant tumour that may invade surrounding tissues or spread to distant parts of the body.. This article explains how breast pain is investigated and treated.

Contents

Introduction

Understanding the causes of breast pain

Mastalgia literally means 'pain in the region of the breast' and it is the most common symptom reported by women attending breast clinics. To make a full assessment of the cause of the pain, all patients require a full history, examination and, sometimes, further investigations. True breast pain can either be cyclical (getting worse before menstruationThe shedding of the lining of the uterus (period), as part of the female reproductive cycle.) or non-cyclical (unrelated to menstruation). It is important to point out that breast cancer does not usually cause mastalgia.

Clinical assessment

Clinical evaluation of a patient with pain includes a detailed history to determine the nature, timing, duration and severity of the pain. The relationship to the menstrual cycleThe monthly sequence by which a woman’s body prepares for potential fertilisation of an egg released from the ovaries, involving thickening of the uterus lining and then shedding of the lining when pregnancy does not occur. is very important in order to establish the cause of breast pain. Evaluating the impact of the pain on work and social activities is also very important. A patient’s history must include questions to assess the patient's risk of breast cancer such as the family history. This should be followed by a careful examination of the breasts and armpits. In the case of non-cyclical mastalgia, particular attention should be paid to non-breast causes of pain e.g. ribs, muscles, heart, stomachthe organ or the body where food is stored and broken down.

Investigation

Investigation of patients with breast pain should be directed to breast cancer screeningA way to identify people who may have a certain condition, among a group of people who may or may not seem to. While mastalgia is not a usual symptom of breast cancer, it does present an opportunity for screening for this very common cancer in a context where there is generally poor access to medical care. However, radiological investigation is not necessary in young women with no risk factors, cyclical mastalgia, and a normal breast examination.

Digital mammographyA diagnostic and screening test using low-dose X-rays to detect breast tumours is recommended for women over 40, those with a positive family history and patients with non-cyclical mastalgia (older than 35).

If the physical examination or radiology identifies an abnormality such as a breast lump or symmetrical lumpiness, this must be fully investigated according to standard protocols, this includes a scan and needle biopsyThe removal of a small sample of cells or tissue so that it may be examined under a microscope. The term may also refer to the tissue sample itself.. It is not uncommon for women presenting with mastalgia to have breast cancer as an incidental finding on screening.

Cyclical mastalgia

This type of breast pain typically occurs in young women (under 40 years old) in the days preceding each menstrual period. Women often report that the breasts feel heavy, larger in size and become generally uncomfortable. The cause of cyclical mastalgia is thought to be hormonal in nature and is related to abnormal fatOne of the three main food constituents (with carbohydrate and protein), and the main form in which energy is stored in the body. levels in the bloodA fluid that transports oxygen and other substances through the body, made up of blood cells suspended in a liquid.. Women suffering from the condition are advised to use a pain chart (click on image below) to assess the duration and severity of the pain to help the doctor make the appropriate treatment decisions.

Breast pain chart

The doctor will usually perform a physical examination and inspect the pain chart. If no breast lump is found, the patient is reassured immediately. Such reassurance is sufficient to alleviate anxiety in the majority of cases. Women who suffer from pain lasting longer than seven days each month can be offered medical treatment.

Simple measures are usually attempted first, including the use of a well-fitting bra, a low-fat diet, flaxseed supplements, regular exercise and/or simple analgesicsAnother term for painkillers. such as ibuprofen (tablet or local gel as required). If these fail to improve the symptoms, then the patient is advised to stop taking oral contraceptives.

If the pain is severe and persistent, then stronger drugs can be used, such as cabergoline and tamoxifen. However, these drugs can have side-effects such as weight gain and hot flushes. Tamoxifen (5 to 10 mg daily) is the most effective but should not be used for more than 6 months. Cyclical mastalgia usually improves with age.

Non-cyclical mastalgia

This refers to pain in the breast area that is unrelated to the menstrual cycle. Non-cyclical mastalgia may arise from the breast tissueA group of cells with a similar structure and a specialised function. itself, the underlying ribs, or from conditions such as hiatus herniaProtrusion of abdominal contents into the chest cavity through an abnormally large gap in the diaphragm and anginaA central chest pain caused by insufficient oxygen supply to the heart.. Although non-cyclical breast pain is not usually a symptom of cancer, occasionally, cancer has been detected in women with breast pain, especially if they are over 40 years old. Consequently, if you have non-cyclical mastalgia, it is important to consult your doctor.

Women with non-cyclical breast pain affecting one breast will require a breast examination and they should also have a mammogramAn imaging study of the breasts, for example, by X-ray. if they are over 35 years old. Treatment will depend upon the cause of the pain. Inflammation in the ribs can be treated with simple painkillers, such as ibuprofen (tablet or gel), whereas other conditions, such as angina or hiatus hernia, will require specialist treatment.

The general treatment for non-cyclical mastalgia is listed below:

  • Wear a well-fitting, firm bra.
  • Optimise body weight and undertake regular exercise.
  • Increase the amounts of fresh fruit and vegetables and reduce animal fat in your diet.
  • Try flaxseed supplements.
  • Try ibuprofen tablets or cream/gel.
  • If there is a 'trigger spot' in the breast, then an injection of local anaestheticA medication that reduces sensation in a part of the body. and steroid will relieve symptoms in most cases.
  • Discontinuing Hormone Replacement Therapy (HRT) may relieve severe mastalgia in some post-menopausalAfter the menopause - technically only once a woman has had no menstrual period for one year. women.
  • If the above measures fail and the breast pain is severe then it is worth trying tamoxifen (5 to 10 mg daily) or cabergoline (0.5 mg once weekly) under medical guidance and supervision.

Summary

Mastalgia, also known as pain in one or both breasts, is a common symptom and can be both cyclical and non-cyclical. All patients with mastalgia must be fully investigated and any chance of breast cancer established. The treatments for both cyclical and non-cyclical mastalgia can vary from changing your brassiere to receiving injections of local anaesthetic.

For further reading please see the article by Lydia Cairncross.
Mastalgia: mastalgia is one of the commonest breast symptoms presenting to general practitioners and surgeons. Continuing Medical Education 2010; 28(11)

For further information on the author of this article, Consultant Breast Surgeon, Professor Kefah Mokbel, please click here.
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