I have a red itchy rash that looks like mosquito bites. some of it has clustered on my arm. it is located on my wrists, arms, and stomach. ?

Rash: Rashes are among the most difficult to diagnose without a physicial exam however; some raches have characteristic distribution patterns. Chigger bites can occur in the distribution you describe however, multiple other causes are possible. Accurate diagnosis will require a history and physical exam by an experienced physician, start with a primary care provider, then dermatology.

Bedbugs or virus: While viral illness could be the cause, don't forget about bedbug ties. Also need to consider what medications/vitamins have recently been taken.