Hi I whent sailing on the weekend and I fell out the boat several times. Arm started acking afterwards and a bump has appeared on my lower arm just below my wrist . It hurts to move my thumb and twist my wrist also hurts to touch swollen area. I’m not in a lot of pain but it is causing me discomfort. although there was a stage wewre it realy did hurt to grip my hand . There’s no bruising. So I’m just wondering if it maybe any more than just a pulled muscle . I don’t remember banging it but it did hurt after sailing although the water was quiet cold so I may of not noticed.