It's possible that warts might come back even after wart treatment. This may occur due to many reasons. First, the wart may not have been entirely removed. In fact, surgery removes the wart but does not destroy the human papilloma virus that causes the wart. Second, the incision may become re-infected with the virus. Third, you may have an impaired immune system which can trigger the virus. Finally, you recently may have changed your lifestyles. I think you should get it checked immediately. Besides, avoid touching this small whitish bump and cover it with a bandage. Take care not to share your personal items. Eat healthful with raw fruits and vegetables. Add Vitamin A, Vitamin C, Vitamin E and Omega-fatty acids to boost immunity. Avoid smoking, alcohol and drugs. You can also try some helpful home remedies like tea tree oil, apple cider vinegar and garlic. Some clinicians have attempted nightly application of topical medications and see result.