Hi doctors,

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.


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

Regards,
Cheng