Understanding and Managing Chronic Pelvic Pain

• Anxiety, depression, and sleep disturbances.
• Previous or ongoing trauma or abuse.
• Social stressors and the resulting impact on the patient's daily function.

Clinical Tip: The Pain Diary To help differentiate between cyclical and non-cyclical pain, advise patients to keep a detailed pain diary for 2–3 menstrual cycles. This tool is invaluable for identifying triggers and patterns that may point toward specific diagnoses like endometriosis or fibroids.

Diagnostic Investigations

Imaging and Laboratory Tests

The diagnostic pathway has shifted in recent years. Transvaginal ultrasound (TVUS) is now considered the first-line investigation.

• TVUS: While useful, a normal TVUS does not rule out endometriosis, as it often misses superficial peritoneal disease. However, if "soft markers" are present (such as pain over the probe in specific areas, visible lesions, or adnexal masses), the success rate of finding pathology via subsequent surgery increases significantly.
• MRI: This is particularly useful for assessing suspected adenomyosis or deep/rectovaginal endometriosis. Note that a normal MRI also does not exclude superficial endometriosis.
• CA125 Testing: This should be performed in any patient presenting with "red flag" symptoms.
• STI Testing: All sexually active women with CPP must be offered STI testing. It is vital to remember that Pelvic Inflammatory Disease (PID) is a clinical diagnosis; a negative microbiology result does not rule it out.

Surgical Intervention

Diagnostic laparoscopy was previously the gold standard, but it is now reserved for specific scenarios. It is invasive and carries a significant risk of a negative result, with negative diagnostic laparoscopy rates ranging from 1/3rd to 1/2. It remains the best method for identifying peritoneal endometriosis and adhesions.

Warning: Red Flags If a patient presents with any of the following, escalate investigations immediately:

• Systemic illness or B symptoms (e.g., weight loss, night sweats).
• Persistent abdominal distension or increasing abdominal girth.
• New bowel or urinary symptoms.
• Abnormal vaginal bleeding (especially post-menopausal bleeding).

Empirical Treatment Trials

In many cases, rather than proceeding immediately to invasive surgery, clinicians can use empirical treatment trials to guide diagnosis.

Analgesia Management

Effective pain management should be offered even while investigations are ongoing.

1. Standard Analgesia: NSAIDs, with or without paracetamol, are appropriate for many patients.
2. Neuropathic Pain: If neuropathic components are suspected, consider adjuvant agents such as amitriptyline or gabapentin, following current prescribing guidelines.
3. Opioid Stewardship: Avoid routine, long-term opioid prescribing for chronic pelvic pain.

If the pain remains inadequately controlled despite these measures, the patient should be referred to a specialist pain team or a dedicated pelvic pain clinic.