Red itchy bumps around ears, arms and breast

[cpeng75]

Here is the story. I had a camping in national park last summer and got these red itchy bumps. The symptom was gone away after I took 1% hydrocortisone cream and Chlorpheniramine for a week. Four months later, these bumps came back again starting from ears and then spreading to arms and breast. They are extremely itch, especially at the midnight. It has been a month since it came back but nothing has been recovered.

The red bumps look like the following:
http://picasaweb.google.com/cheng.peng90/RedBumps?authkey=Gv1sRgCMacquHghZSyGA&feat=directlink

Any ideas on how to treat? What is the cause of this issue?

[National Jewish Health]

Your description and the photo, with what appears to be the “Christmas tree distribution” that follows the fold lines of the skin suggest the diagnosis of Pityriasis Rosea, a skin condition of unknown etiology that may take weeks or months to resolve.  But, given the recurrence and the possibility that the skin lesions could be a sign of some type of internal disease, you should see a dermatologist.

[cpeng75]

Thank you so much. I was told by a dermatologist that I got the infection of Helicobacter Pylori. By treating this disease, these bumps are gone.