The short version
- A cone-shaped piece of tissue is removed from the cervix and the cervical canal with a scalpel. [1]
- It is both a diagnosis and, for many precancers, the treatment.
- Avoid strenuous exercise for about 3 to 4 weeks. No lifting over 20 pounds for 4 weeks. Pelvic rest for 4 weeks. [2]
- A brown discharge that looks like coffee grounds is expected and comes from Monsel's solution. It is not blood clots. [2]
- If you want to be pregnant in the future, say so before the procedure is planned.
Your own discharge papers come first
Everything on this page is taken from the standard printed instructions this office gives patients. If the papers you were handed at discharge say something different, follow those. They were written for your operation. When the two disagree, call the office at 817-759-7065 and let us settle it.
After a cone biopsy
The printed instructions for this exact procedure. Worth putting on the refrigerator.
What it is
The National Cancer Institute describes cold knife conization as using a scalpel to remove a cone-shaped piece of tissue from the cervix and cervical canal. [1] The cone is shaped that way on purpose. Abnormal cells tend to sit at the border between two kinds of cervical tissue and extend up into the canal, so a cone captures the whole area in one piece with its edges intact.
The word cold in cold knife means no heat is used. A scalpel gives the pathologist clean, unburned edges to read, which matters when the question is whether the abnormal area was fully removed. It is done in the operating room, under anesthesia, and you go home the same day.
Why it is done
- A biopsy showed a significant precancer and the whole area needs to come out.
- The colposcopy could not see the top of the abnormal area, so the canal has to be sampled.
- The Pap result and the biopsy result do not agree.
- There is a question of whether an early cancer has invaded, and the answer requires seeing the tissue in one piece with its edges.
For many women the cone is the end of it. The abnormal area comes out, the edges are clear, and what follows is surveillance rather than more treatment.
The coffee-ground discharge
This one is worth reading before you go home
A mustard-colored solution called Monsel's solution is usually applied to the biopsy site to stop bleeding. When it mixes with blood it creates a brown discharge that looks similar to coffee grounds. If you see this, it is normal. [2]
Patients call about this more than anything else after a cone, and they are usually frightened. It is the medicine, not a hemorrhage.
Recovery
- Diet. Resume your normal diet. [2]
- Pain. Cramps and soreness are normal. Ibuprofen as needed, or Tylenol if you cannot take ibuprofen. Prescription medicine is for breakthrough pain. [2]
- Bleeding. Some spotting is normal in the days afterward. Use pads, not tampons, and change them regularly. [2]
- Exercise. Avoid strenuous exercise for about 3 to 4 weeks. [2]
- Lifting. Nothing over 20 pounds for 4 weeks. [2]
- Pelvic rest. No intercourse, no douching, nothing in the vagina for 4 weeks. [2]
- Driving. Not the day of surgery, not if soreness slows your reaction time, and not while taking prescription pain medicine. [2]
- Bathing. Shower when you feel comfortable. Avoid tub baths and hot tubs for 2 weeks. [2]
- Constipation. Avoid straining. Drink plenty of water and use a stool softener twice daily as needed. [2]
- Walking. Get up and walk at least every 1 to 2 hours in the days afterward, to prevent blood clots in the legs. [2]
- Follow-up. Your 2 week and 6 week visits were booked when the procedure was booked. Check the blue folder, or call 817-759-7019. [2]
Fertility and future pregnancy
A cone removes part of the cervix. For most women that has no effect on getting pregnant. What it can affect is a future pregnancy, because the cervix is what holds a pregnancy closed, and how much was removed matters.
If you hope to carry a pregnancy, say so before the procedure is planned. It can change how much tissue is taken and how you are followed in a future pregnancy. This is a conversation to have at the beginning, not afterward.
When to call
When to seek care right away
Call the office now, or go to the emergency department, if you have:
- A fever of 101 degrees Fahrenheit or higher
- Chest pain or shortness of breath
- Nausea and vomiting you cannot get on top of
- Bleeding through more than one pad an hour
- Vaginal discharge with a foul odor
- Trouble emptying your bladder, or burning when you urinate
- Increasing swelling in one leg
- A sudden gush of blood, or filling more than one pad an hour
After a cone biopsy
The printed instructions given after a cold knife cone procedure.
Sources
- National Cancer Institute. Cervical Cancer Treatment (PDQ) Patient Version. Updated April 3, 2025. https://www.cancer.gov/types/cervical/patient/cervical-treatment-pdq
- Vasques DR. Post Cold Knife Cone Procedure Instructions. The Center for Cancer and Blood Disorders, Fort Worth, TX. Patient handout supplied by the practice. pdfs/after-cone-biopsy.pdf
- Screening for cervical cancer. Committee Statement No. 28. American College of Obstetricians and Gynecologists. Obstet Gynecol 2026;148:e63-e67. Published online April 15, 2026. https://www.acog.org/clinical/clinical-guidance/committee-statement/articles/2026/07/screening-for-cervical-cancer
Reviewed by DeEtte R. Vasques, DO, MBA · September 2026