If you absolutely feel like you have to remove the hair use a pre shaving oil and a single razor blade to shave with the grain. The pubic area is a common place for folliculitis to occur because of shaving moisture and friction from tight clothing or sports equipment such as a jock strap.
Itchy pubic hair can occur due to a sexually transmitted infection irritation from shaving or certain skin conditions.
How to get rid of shaving irritation on pubic area. Stay away from hot water drying and fragranced bath products saunas and tanning beds until the irritation is gone. If at all possible lay off shaving until your skin recovers. Treatment depends on the cause.
The pubic area is among the most prone parts of the body to feeling itchy and razor burned because it is a very sensitive area for most and the hair in that area typically is thicker.