As with other filler injections where a needle on a syringe is being injected into the skin, small amounts of swelling are possible after liquid silicone injections. With the microdroplet injection technique used when injecting liquid silicone, very small amounts of silicone are being injected at any given treatment session. Therefore, the swelling is mostly related to the needle injections and less to the silicone material itself. Therefore, swelling usually resolves within a few days of the treatment. If swelling is still noticeably present or worsening after a week beyond your treatment, I recommend you contact your doctor for a follow up evaluation.