I get a stinging pain/sensation from them when l stroke my face to put moisturizer on etc. Or when l yawn/laugh. Will these lumps be covered as the collagen grows or will l just have to wait until they dissolve. I had bad swelling and bruising that lasted for 3 weeks. The procedure was extremely painful especially around my mastoid processes l thought she was drilling the needle into the bone.l had large painful swelling behind my ears lasted for over a week. my GP for strong pain killers.