Tetracycline is not often used topically, but rather as an oral antibiotic. You can also use it as a solution or ointment at different strengths. Tetracycline contains sodium bisulfite, derived from sulfa. It can cause an allergic reaction and may cause yellowing of the skin. However, it's popular as an oral antibiotic with dermatologists. It may have the same side effects as the other two.
One of the methods of removing these scars is by filling scars with the help of collagen injections so that the skin is stretched and smoothened out. This method can be used for soft scars and another problem with collagen injection is that it should be repeated after few months. Autogous fat transfer is a method for the treatment of deeper scars. In this method the fat is taken from another part of one's body and injected into the scarred tissue. This procedure should also be repeated after few years since the fat gets absorbed into the skin.
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