I Have Been Experiencing Itching All Over My Body But

I have been experiencing itching all over my body but especially on my scalp and face for the last week. I take Zyrtec and Singular for allergies and have been for several years. I have in the past had an elevated sugar level but not to the diabetes level. I am going to get my sugar level checked just in case but I am not always hungry or thirsty but will check diabetes just in case.