The symptoms of skin tags are similar to wart symptoms but there are also some important differences. Skin tags can be smooth or irregular and range in size from a few millimeters to a few centimeters. While skin tags are usually soft and balloon shaped, warts are harder and usually have a rougher surface. The color of skin tags can range in from pale to dark. Another difference is that warts are caused by the human papillomavirus (HPV) and are contagious, whereas skin tags cannot be transmitted from one person to another. Since warts and skin tags look similar, many people get them confused. If you are unsure if you have a skin tag or wart you should consult a dermatologist or doctor.