You banged your shin very hard and have a lump and pain but no bruise?

No. It has a lump, pain, and a bruise! I now pay better attention when I am walking. If I were to interpret this question, I would guess it means: Why didn't my shin bruise when I banged it, but a lump formed and it hurts?! A bruise will only form if a blood vessel is damaged. Tissue damage anywhere (shin included) will cause an inflammatory response (LUMP and PAIN). You damaged tissue, but no blood vessels.