Michelle Nguyen, a dermatologist and the director of Mohs micrographic surgery at Tufts Medical Center in Boston, tells Allure that what we call skin tags are really just benign skin lesions composed of normal skin tissue. New York City dermatologist Joshua Zeichner adds that skin tags, comprised of extra skin and fat, can happen to anyone. There is, however, a genetic component to them, and people whose parents had them are more likely to get them themselves.
Treat with apple cider vinegar. Get a cotton ball and soak it in apple cider vinegar until it is totally saturated. Place the cotton ball on your skin tag and hold for a few minutes. You can move the ball in a circular motion on the skin to increase absorption if you like. Repeat this process three times per day until your skin tag falls off. This method is usually quite effective. Depending on your skin the vinegar may not be as effective so you can try using apple cider by itself. 
There is some evidence that applying a banana peel or papaya peel to a skin tag may cause it to die and fall off. It seems to be even more effective when used in combination with tea tree oil. Before bed, simply put a few drops of tea tree oil on the skin tag and then cover with a peel, securing in place with a bandage. Repeat nightly until the skin tag dies and falls off. Do not do this if you have a latex allergy or sensitivity.
If you’re experiencing pain after your mole removal or you notice that your mole is growing back, call your doctor so they can take another look. And if you got the mole removed in order for it to be biopsied, you should have your results within a week so that you can either put the entire thing behind you or move forward with a treatment plan if necessary.
Generally, they do not cause any pain or discomfort. However, if they are subjected to friction or damage caused by clothing or jewelry, a small blood clot may occur, resulting in pain. While it may be tempting at that point to simply cut it off, this is not an acceptable way to remove a skin tag. The best practices for how to remove skin tags at home do not involve cutting; this is dangerous and may lead to a severe infection and permanent scarring.
Castor oil has been a medicine cabinet staple for generations, much like baking soda. Together, they may help to safely get rid of a bothersome skin tag. Mix two parts castor oil with one part baking soda and rub it gently over the skin tag. Cover with a piece of plastic wrap, or banana or papaya peel, and secure with a bandage. Leave on overnight and rinse off in the morning. Repeat nightly until the skin tag falls off.
Other skin conditions such as warts and moles can resemble skin tags. Since some moles may be cancerous, it’s best to have your skin tags examined by a doctor. Your dermatologist or family doctor will be able to diagnose skin tags. They’ll likely do this through a visual exam. If they have any doubt about the diagnosis, they may also perform a biopsy.