Possible reasons

• Scar and abdominal-wall healing pain: tightness, pulling, numbness, tingling, or pain with stretching, lifting, coughing, or certain positions. Scar tissue and small nerve irritation can cause this.
• Suture reaction, stitch granuloma, or localized scar inflammation: a tender small lump, sometimes with redness or discharge.
• Wound infection or collection/abscess: more likely if there is increasing redness, warmth, swelling, pus, fever, or worsening tenderness. Cesarean complications can include wound hematoma, separation, and infection. Creasy & Resnik’s Maternal-Fetal Medicine, “Complications of Cesarean Delivery.”
• Incisional hernia: a swelling or bulge at or near the scar that becomes more obvious on standing, coughing, or straining. Prior wound-healing problems raise the risk. Roberts and Hedges’ Clinical Procedures in Emergency, “Incisional Hernia.”
• Nerve entrapment/neuropathic scar pain: burning, electric-shock, pins-and-needles, hypersensitivity, or numbness around one part of the scar.
• Scar endometriosis: less common, but consider it if there is a painful lump in the scar and pain predictably worsens around menstrual periods.
• Pain not actually from the skin scar: urinary infection, constipation, ovarian cyst, pelvic infection, or other pelvic/abdominal causes can feel like scar pain.

What assessment may be needed

1. Inspection and examination of the scar and abdomen, including checking for a bulge/hernia.
2. Urine test if there is burning urine, frequency, or lower abdominal pain.
3. Pelvic examination if there is vaginal discharge, bleeding, deep pelvic pain, or pain during intercourse.
4. Ultrasound of the abdominal-wall scar and pelvis if there is a lump, swelling, persistent focal pain, or concern for a fluid collection or hernia. CT/MRI is occasionally needed.

Treatment depends on the cause

• Simple healing/scar pain: avoid heavy lifting and activities that trigger it temporarily; gentle walking; scar mobilization or pelvic-floor/abdominal-wall physiotherapy after clinician review; heat may help if the scar is fully closed and there is no sign of infection.
• Pain relief: paracetamol/acetaminophen or ibuprofen may be appropriate if you can safely take them. Avoid ibuprofen if you have a history of stomach ulcer/bleeding, kidney disease, allergy to NSAIDs, or are on certain blood thinners. Check with your clinician, particularly if breastfeeding or taking other medicines.
• Infection/abscess: needs medical evaluation, antibiotics when indicated, and sometimes drainage. Do not self-start antibiotics.
• Hernia: referral to a surgeon. Symptomatic, enlarging, or complicated hernias may require repair.
• Nerve-related pain: targeted physiotherapy, topical/local treatments, or a pain/gynecology review may be needed.
• Scar endometriosis: gynecology review; treatment is often surgical removal of the affected scar tissue, with hormonal treatment considered in selected cases.

Seek urgent care today if you have

• Fever of 38°C / 100.4°F or higher, chills, or feeling unwell
• Redness spreading around the scar, warmth, increasing swelling, opening of the wound, pus, bad smell, or fluid leakage
• Severe or rapidly worsening lower-abdominal pain
• A painful hard bulge at the scar, especially with vomiting, constipation, or inability to pass gas
• Heavy vaginal bleeding, foul-smelling vaginal discharge, painful urination, shortness of breath, or leg swelling/pain.