If the rash has been bothering you for over a week and still shows no signs of going away, you should visit a doctor as it could be an unusually severe allergic reaction or some entirely different problem such as an infection. Normally, even an allergic rash or a reaction to some irritant should last for just two or three days, but in some cases they last longer and you may need to take some medication to treat the reaction, such as antihistamines to end the reaction...