Kiyanna Williams, MD | Dermatologist

I always say, the more you hated it-the more you needed it.

Let’s talk about it, because this little cream does some BIG things. Efudex (fluorouracil) is a topical treatment for actinic keratoses — those rough, scaly precancerous spots that show up after years of sun damage and can turn into squamous cell carcinoma if we ignore them.

Here’s why I love prescribing it:

**1. It treats the whole FIELD, not just the spots I can see.** Cryotherapy freezes the lesions I spot in clinic — Efudex hunts down the ones brewing under the surface too.

**2. The inflammation means it’s WORKING.** You’ll likely get red and crusty for a few weeks (typical course is 2–4 weeks). Some redness and peeling is expected — that’s the cream targeting abnormal cells. But heads up: severe pain, swelling, or intense burning isn’t “working harder,” it’s your sign to call your derm.

**3. It may lower your skin cancer risk.** In a large trial of high-risk patients, a course of 5-FU cut the risk of squamous cell carcinoma needing surgery by about 75% in the first year. The long-term prevention benefit is less certain — but treating precancers beats waiting and cutting, every time.

The honest truth? This is not a cute, painless process. Your skin will be mad at you. But I’d take a few weeks of looking rough over a Mohs appointment with me any day — and I say that as someone who genuinely loves my job 😌 ALSO: many people note how much better/clearer their skin looks after.

One important note: Efudex can cause harm in pregnancy and isn’t for everyone (including people with DPD enzyme deficiency), so this is a decision you make *with* your dermatologist — not from a reel.

If you’ve got persistent rough spots, sun damage, or your derm has ever mentioned “field therapy,” ask whether Efudex could be right for you. Every skin is different and this isn’t medical advice — just your derm bestie telling you the truth.

Drop a 🔥 if you’ve survived the Efudex journey — or if you just got the tube and you’re scared. And save this for when you need a pep talk mid-treatment.

#ActinicKeratosis #Efudex #SkinCancerPrevention #Dermatology #SunDamage