Can I use castor oil on my biopsy site for basal cell carcinoma? - #48433

No, do not apply castor oil to an open biopsy site (especially within 1–2 weeks and before Mohs surgery).

A biopsy site that was lanced is still considered an open or healing wound, even if it looks small. Castor oil is occlusive and heavy, which can: Trap bacteria Delay proper wound closure Increase risk of irritation or infection Dermatologists typically want the area: Clean Moist with something inert (like plain petroleum jelly) Free of botanicals or oils before Mohs surgery so margins and healing aren’t affected Most Mohs surgeons specifically advise no herbal oils, essential oils, or medicated ointments before surgery.

Do not use castor oil on an open biopsy wound, especially when basal cell carcinoma is diagnosed and Mohs surgery is planned.

Open wounds need to stay clean and sterile Oils can trap bacteria, delay healing, and increase infection risk It may interfere with proper wound assessment before Mohs surgery

What to do Clean gently with normal saline or clean water Apply plain petroleum jelly (Vaseline) or the ointment prescribed by your doctor Cover with a clean dressing Keep the area dry and protected