Weba missed shot is a phrase used to describe a swelling which appears at the injection site during or right after a shot. Fluid enters the tissue surrounding the vein because the. Webof those that aimed to inject intravenously, 56% (181) reported ever missing a vein (for 51 this occurred more than four times month on average). Factors associated with 'missed. Webif you miss the vein (missed hit) if you miss a vein, you may feel some pain and swelling where you’ve injected. Missing the vein raises the risk of…