Silver dressings are a type of antimicrobial (germ-fighting) dressing. It helps to know both what they do and where they stop working.
Here’s how they work: silver ions disrupt bacterial cell walls and DNA synthesis, and they also switch off bacterial enzymes. Their advantage is simple: they fight a wide range of germs.
Their use is narrow. They can be used on wounds with a surface infection, or those with a high risk of infection.
The key word there is surface. Silver dressings should not be used on deep wounds, because silver ions cannot penetrate deep wounds. A dressing that works at the surface does not reach what it cannot touch.
As for drawbacks, oxidized silver can stain skin. They are changed daily or every few days, depending on how soaked the dressing is.
One point matters more than any of the detail. A silver dressing is a response to infection or to a high risk of it, and infection in a wound is assessed by examining it. So choosing an antimicrobial dressing is not a decision that can be made from a description of symptoms, and it is not a substitute for having the wound looked at. For several wound types, you should contact your provider when signs of infection appear — that stays true whether or not an antimicrobial dressing is in use.
Antibiotics should be considered if there are signs of infection spreading through the body. That is a different situation from a locally infected wound, and a decision for a clinician.