Itching hands can be caused by several factors. If there is a temporary rash associated with the itching, it's most likely an allergen which has caused the discomfort. The skin likely came in contact with a substance or chemical which acted as an irritant. Alternatively, there are several chronic disorders, such as dermatitis, psoriasis, and eczema, which can cause various blemishes or rashes to regularly appear on the skin. Apart from allergies and disorders, itching hands can also be a result of overly dry skin.

Hands that itch due to dry skin are often the easiest to remedy. If the skin is cracked and flaky, it means the hands need more moisture. This over dryness can be caused by frequent washing of the hands or failure to protect the hands during various activities.

Applying lotion can usually help provide immediate relief for itching hands and fingers. Regularly applying lotions, even when not experiencing itchy palms, can help prevent future discomfort. Wearing gloves while doing the dishes, housework, or yard work protects the hands and may help prevent dryness and discomfort.

For instances of itching hands that seem to appear at random, it's likely the individual has come in contact with a foreign substance. Everything from a new laundry detergent to abrasive chemicals can irritate the skin and cause itching. This is because the body's immune system is reacting to the chemical and doing what it can to fight any toxins that may be entering the body. The result can be redness and itching.

For mild rashes caused by these chemicals, the individual can wash the effected area and apply lotions as needed. He or she should also avoid contact with any of those potentially harmful chemicals in the future. More serious rashes cause by foreign chemicals — especially those that can cause chemical burns or permanent damage — should be treated by a medical professional.

Itching hands can also be caused by an allergic reaction to something the individual consumed or breathed, increased stress, or even genetics. There is still debate about the various causes and triggers of conditions like dermatitis, psoriasis, and eczema, as well as how to treat each condition. Skin disorders are varied and can manifest differently in different individuals, which means people will often need to discover for themselves how best to treat them. Over-the-counter antihistamines, topical creams, and cold compresses can help treat the itchy symptoms, although many skin disorders have no permanent cure.