Hi and thanks for the query,
Itchy rashes and lymph
nodes around the neck region might most of the time be due to viral infections. It could be necessary to actually trace what is causing the rash. A history of a recent change in the environment, diet, sleeping room, job site should worth considering.
Other accompanying symptoms like fever, wheezing
are important to consider to know if its an allergic reaction
or not. An initial response to anti biotherapy could indicate an infectious cause. Persistence of symptoms should warrant an appointment with the dermatologist
for a proper evaluation.
Thanks and best regards,