Dermatology Questions? Ask an Online Dermatologist.
This is Dr. David
if the skin is dry, you can use thick skin moisturizers like gold bond or vasaline intensive care
you need a doctor to look at your back and see if you have eczema or a skin fungal infection on your back which can cause itching.
for eczema you might need steroid creams to help calm down itchiness
for a skin fungal infection you would need antifungal creams like clotrimazole
if you have a pinched nerve in your spine causing abnormal nerve sensation on your back then you would need a spine MRI scan to look for pinched nerve.
so there are several possible causes for your symptoms of itchy skin
let me know if you have questions.