question: I have, over the last year, been afflicted with chigger bites in the hundreds 6 times. These episodes ,which occur after relatively short ammounts of time in suburban areas, have promted me to seek medical attention twice. The prescribe has been cortisone. Each time I have serious welts and icthing but only 2 to 3 days after exposure. Primarily on my arms. I never feel a bite, nor discomfort  until the horrendous  itch. I have psoriasis as well as psoriatic arthritis, which I understand to be an autoimmune deficiency disease. My query is why do the people directly in contact with me in the exact situation for the same ammont of time never receive bites. Does the immune system play a part in my reaction to these bites  and what can I do to protect myself ? I use prymethren on my clothes, I shower after being out , and I don't roll around on the ground. My doctor is stymied and who do I seek out? A dermatologist? An allergist?