Instructions
Rest your fingertips after playing. After one or two days of rest, your fingers will be stronger.
Soak your fingers in apple cider vinegar for one minute before and one minute after playing. This will dull pain and improve the strength of your fingertips.
Numb the pain by putting your fingertips on an ice bag. While a guitarist won't likely play long enough to think they need an ice bag, the ice will relieve pain that sometimes happens the morning after playing.
Practice guitar for approximately 30 minutes each day to develop calluses on your fingertips. The calluses will lengthen the amount of time you can play while improving the crispness of the sound.
Use light strings when you play. Electric guitars are also easier to play than acoustic because the strings are much lighter.