Itching after vaccination may be caused by other allergic reactions or by adverse reactions to the vaccine.
After vaccination, itchy body, in addition to the body will appear spots, pimples, and the whole body in multiple occurrence. This is an allergic reaction and can be treated with loratadine or cetirizine.
If itching occurs after vaccination, but there is no rash, it may be an adverse reaction to the vaccine. Vaccine belongs to the heterogeneous protein, inoculation into the human body is prone to cause adverse reactions, such as injection site slight redness, swelling, pain, itching performance. This situation does not require special treatment, and will generally ease slowly.
If the symptoms are not relieved, you should go to the hospital and use medication under the guidance of the doctor.