Nursing care
Perineal Lacerations nursing care: what to assess and what to do first
Written and reviewed by Dana Whitfield, RN, MSN · 5 min read · Updated September 2026
Short answer
Perineal lacerations after vaginal birth are graded first to fourth degree by depth. First degree is skin only; fourth degree extends through the anal sphincter into the rectal mucosa. Grade determines care: a fourth degree tear rules out enemas, suppositories and straining, and calls for stool softeners and a low-residue approach to protect the repair.
The clinical picture
Perineal lacerations happen during the second stage of labour as the fetal head and shoulders stretch tissue faster than it can accommodate. Nulliparous women, operative vaginal birth, occiput posterior position, shoulder dystocia and a rapid second stage all raise the risk. Midline episiotomy also raises the risk of extension into a higher grade tear.
The four grades describe depth, not severity of bleeding. First degree involves only the perineal skin and vaginal mucosa. Second degree extends into the perineal muscles. Third degree involves the anal sphincter complex, and is further split into 3a, 3b and 3c depending on how much of the external and internal sphincter is torn. Fourth degree goes through the anal sphincter and into the rectal mucosa, creating a direct connection between the vaginal and rectal walls.
Assessment: what to look for and in what order
Assess for bleeding and haemodynamic stability first: pad count, visible active bleeding, heart rate and blood pressure. A boggy fundus points to uterine atony rather than a laceration, so palpate the fundus before assuming the tear is the source of blood loss.
Once the patient is stable, inspect the perineum systematically from the vaginal opening outward, noting the apparent depth and whether the anal sphincter or rectal mucosa is involved. A rectal exam by the provider confirms sphincter and rectal mucosal integrity and sets the final grade. Document the grade exactly as recorded by the provider; it drives every order that follows. Assess pain using a validated scale and ask specifically about rectal pain or a sense of pressure, which can signal a haematoma forming behind the repair.
Immediate interventions
Apply ice to the perineum in the first 24 hours to limit oedema and control pain; alternate on and off in short intervals rather than continuous application. Position the patient side-lying rather than flat on the back to reduce pressure on the repair site, and offer a peri-bottle for hygiene instead of wiping directly.
For a fourth degree laceration, withhold enemas and rectal suppositories entirely, because inserting anything rectally risks disrupting a repair that sits directly against the rectal mucosa. Start a stool softener such as docusate on the first postpartum day, along with a fibre supplement, to keep the first bowel movement soft and to avoid straining. A low-residue diet is sometimes ordered in the first day or two specifically to delay that first bowel movement until healing has begun.
Ongoing nursing management
Continue analgesia on a scheduled basis rather than waiting for pain to peak; a combination of oral analgesics and topical anaesthetic spray is standard. Reassess the perineum at each shift for increasing oedema, spreading discoloration or a widening gap, any of which can signal infection or dehiscence.
Monitor for signs of infection: fever, foul-smelling lochia, and increasing rather than decreasing pain past the first two days. For a third or fourth degree repair, watch specifically for rectovaginal fistula formation over the following weeks, which presents as passage of stool or gas through the vagina. Encourage ambulation as tolerated, since prolonged immobility raises the risk of constipation and clot formation.
Patient and family education
Teach the patient to use the peri-bottle after every void and bowel movement, patting rather than wiping the area dry. Explain that ice in the first day and warm sitz baths from day two onward both help, and that the sequence matters because heat too early increases swelling.
For any third or fourth degree tear, explain clearly why stool softeners are not optional and why she should never use an enema or suppository without checking with her provider first, since the rectal repair sits close enough to the surface that these can cause a fistula. Tell her to report fever, worsening pain after the first few days, or any leakage of stool or gas from the vagina immediately, and to expect follow-up specifically to check sphincter function before resuming normal activity.
How this appears on the NCLEX
Expect a question that gives a laceration grade and asks which intervention to avoid. The distractor to watch for is an order set that includes a suppository or enema for constipation; the correct answer withholds both once the stem specifies a fourth degree tear or any rectal mucosa involvement.
Another common pattern presents postpartum assessment findings and asks you to prioritise. Fundal tone and bleeding always come before wound assessment, but once stability is confirmed, a stem describing spreading perineal oedema or foul lochia is testing recognition of infection, not just routine care. Match the intervention to the exact grade given in the stem rather than defaulting to a generic postpartum perineal care answer.
The next step on this is the same as on everything else here: answer questions and read the rationales. Our maternity and newborn practice questions are the closest set to what this page covers.
Common questions
Can a patient with a fourth degree laceration use a stool softener and a suppository together?
No. Stool softeners are appropriate and expected, but suppositories and enemas are avoided with a fourth degree tear because they are inserted rectally, directly against the repaired area. Softening the stool with an oral agent achieves the same goal without that risk.
How long does a third or fourth degree perineal laceration take to heal?
Most tissue healing occurs over four to six weeks, similar to other postpartum repairs, but full sphincter function can take longer to recover. Some patients need pelvic floor physiotherapy afterward, and follow-up specifically assesses continence before clearing return to normal activity.
What is the difference between a 3a, 3b and 3c tear?
All three involve the anal sphincter complex, but the extent differs. A 3a tear involves less than half of the external anal sphincter, 3b involves more than half, and 3c involves both the external and internal anal sphincter.
Why does the nurse check fundal tone before assessing the laceration for postpartum bleeding?
Uterine atony is the more common and more dangerous cause of postpartum haemorrhage, and it can be corrected quickly with fundal massage or medication. Ruling it out first prevents missing a life-threatening cause while attention is on the perineal repair.