For the last two days, I have been itching all over my body. There is no rash, but I itch on my feet, my hands, my neck and my inner thighs. I?

See a DR. Itching without visible skin changes is extremely difficult. There are hundreds of possible causes, some of them very serious. On any meds? Vitamins or supplements? Illness or any other symptoms? Ever before? You need exam, blood tests, xrays, maybe biopsies. No antihistamine helps this. Brand of laundry detergent is not of interest. It is not diet and probably not allergy.
Itch. This could be secondary to dry skin as the weather is changing. Continue to hydrate yourself and apply moisturizer to your skin. You may also try Benadryl (diphenhydramine) of itch relief. If you start noticing a rash, consult your PCP immediately.

Related Questions

I have a rash that is forming up all over my body, some areas itch some areas don't. My feet and hands are what itches the most. What is the cause?

Skin Rash. Skin rashes can occur from a variety of factors, including infections, heat, allergens, immune system disorders and medications. A diagnosis can be made with a skin biopsy. Read more...