I have a splinter on my hand that I got yesterday, I woke up today and its red around the splinter, ?

Remove splinter. Your body senses a foreign object and is attacking the site. Try to get the splinter out with a clean tweezer if you can. If you notice the redness spreading or if there is fluid draining from the site, see your doctor to get this evaluated.
Local irritation. It's not common for infection to occur in such a short period of time. The redness is most likely a local immune response to the foreign body. If this worsens, spreads out or streaks or begins to drain then it should be seen.