When ever I feel any kind of lump or different feeling I jump in the shower and do slow firm massage strokes towards the nipple from all around the whole breast under the hot water, I use a bit of body wash to get it nice and slippery so easier to massage. I barely would get any milk come out but I kept going to make sure things were as clear as they could be through massage. 14 months of BFing and no mastitis (fingers crossed) yet!!!