How can I tell if my cut is infected, if it is what do I do about it?

Warm salt water soaks for 30 minutes per day for 2 days maximum unless improving. Otherwise, keep it bandaged and clean. If not improving, becoming increasingly red, swollen or sore, see a doctor. You may have retained part of the splinter as well as have an infection in progress. Farmwork means you are at risk for staph infections and exposure to Tet bacteria.