After discontinuing aspirin, it takes 5 days for platelets to turn over and new platelets to take their place, thus 5 days for platelet function (clotting) to return to ‘normal’.
When I was having so many stress related heart arrythmias, my doctor put me on the baby aspirin regimen. She said that since it wasn’t AFIB, if I started bruising, to stop. I took it for quite a while before I saw bruises. She also had me on fish oil and I figured out that it can cause blood thinning too. I was able to take one at a time but not both. She said it was OK to stop the aspirin if I wasn’t having arrythmias. I was able to stop it for a few years when I retired because my stress level went away. I have had to take it for the last two or three years because my stress came back but I stopped the fish oil while taking aspirin. I haven’t had anymore bruising with just the baby aspirin.