This is a good question. Be sure to keep your appointment with your primary care doctor
or ob/gyn that you have scheduled in a few days so that you can have a complete history and physical and testing if needed. From what you are describing it is definitely possible that you are having an allergic reaction to something your skin has been in contact with, such as a new pair of underwear or lotion. The medical term for this is contact dermatitis. Another possibility is razor burn if you shave your pubic area in this region. Be sure to always use a clean sharp razor. Anyone who is sexually active needs to be concerned about STDs, such as pubic lice, so be sure to mention your sexual history to your doctor as well. In the meantime before your appointment it is very important that you do not scratch the itchy area as this can lead to breaks in the skin and infections. Try to keep your nails very short so that if you do find yourself scratching there is less chance of a break in the skin. Also, keep your skin from drying out by taking short, lukewarm showers and pat drying with a soft towel. Again, please discuss this with your doctor.