This is Dr. David
what do you mean you had "flu jab" this morning? you got a flu shot?
some people can get allergic type hives and rash after the flu shot sometimes
sometimes patients can get fatigue, low grade fevers after a flu shot.
there is colder weather now which can cause dry itchy skin.
can you upload a clear jpg photo of the itchy lumps on the neck so I can better look at them.
this could possibly early shingles on the neck.
or from blocked skin pores.
here are instructions of how to upload a clear jpg photo
type a word in the textbox and highlight it
then select the "chain" icon above the textbox or the paper clip icon to upload a jpg
this opens a window where you can click next to the text box to select the jpg or pdf file on your computer to upload into JustAnswer