Itchy back like pins and needles may be caused by physiological reasons, such as skin sweating to stimulate the skin, etc.; it may also be caused by pathological reasons, such as contact dermatitis, herpes zoster and other diseases.
1. Physiological reasons: if the weather is hot, the patient did not wash the skin in time after sweating, the leftover components may stimulate the skin to produce itching sensation, which is a normal phenomenon.
2. Pathologic causes:
(1) contact dermatitis: usually caused by the patient’s skin contact with certain external allergens and cause allergic reactions, including erythema, papules, papules, or even oozing, vesicles, etc., can also be accompanied by the symptoms of itching like pins and needles.
(2) Herpes zoster: When the body’s immunity is low, the latent chickenpox-herpes zoster virus in the body will be activated again, and erythema and clustered blisters may appear, accompanied by itching or pain, which may lead to a prickly sensation on the back, usually not exceeding the midline of the body.
The itchy feeling like pins and needles on the back may also be caused by other diseases, do not rule out the possibility of cardiovascular system diseases, it is recommended that patients go to a regular hospital, under the guidance of the doctor to make a clear diagnosis and standardized treatment.