Once you remove skin tags, they usually don't grow back. However you cannot prevent the new skin tags from forming. Since overweight people tend to get skin tags often, losing weight might help prevent new ones. Because losing weight can help remove excess skin in areas where skin rubs against itself such as neck. Once the friction is minimized, the chances of developing new skin tags might become relatively lower.
You can also minimize friction by not wearing tight clothing or jewellery that rubs off against the skin too often. Even though these facts may not be scientifically proven yet, but if you look at the pattern where people have skin tags or keep on developing new ones, you'll notice that friction plays a huge role.
For skin tag removal, it is best to get in touch with your dermatologist. But most people avoid that route because of how much it can end up costing them, especially if you have multiple skin tags. Not only it can require multiple visits to the doctor's office, but there's more cost involved depending on the number of skin tags.
Most people go with solutions that are similar to the ones that dermatologists offer. One of the procedures through which skin tags are removed is known as electrocautery. This can be done at home too using Aven Buzz Skin Tag Remover Pen.