Hi. My 13 year old son is displaying a rash on his face and neck. It started off as a small red dot on his chin on Sunday, but it has since spread to a bumpy, itchy rash around his chin, jaw, nose area and neck over the past 3-4 days. We were hiking on the Shenandoah trail of Virginia on Saturday and he did trip at one point during the hike landing in foliage, but this rash is not appearing on his arms or hands which he used to break his fall. We have tried to treat with Hydrocortisone and Calamine lotion, but the rash is not going away.