Thanks for the post,
If there are no known substances that you could easily identify that could have triggered the hives
, then it will be well thought if we start considering the fact that the hives could have been emotionally triggered or there might a developing underlying condition notably extreme cold, excessive perspiration
illness (including lupus
, other autoimmune diseases, and leukemia
), infections such as mononucleosis
etc. Since you can not by yourself determine the listed causes, it will be wise to visit a doctor who can take a closer look to find the cause.
Hope this helps