My skin has been itching lately all over my body. but it comes and goes, some days i dont have it. i dont have any other symptoms. i have seasonal allergies and i notice the itching when i dont take meds/am sneezing. what could this be?

You don't mention a rash. Itching of the skin without associated rash is often due to excessively dry skin but can occur with diabetes, liver or kidney disorders. Less common causes are malignancies. Some medications are possible causes. I think a rash accompanies itchiness due to allergies most of the time. To moisturize your skin, rub in moisturizing lotion after a shower while your skin is wet.