Conditions such as eczema, rheumatoid arthritis and hand foot and mouth disease can cause rashes on the hands, according to Healthline, WebMD and MedicineNet. Skin rashes can often be related to conditions that cause inflammation.
Eczema is a condition that causes a skin rash that appears scaly, red and itchy. The skin may become crusted from excessive scratching, and small fluid-filled blisters can develop. This condition often affects people who suffer with allergies or have a family history of allergies. Factors that can exacerbate an eczema rash include stress, climate, skin irritants and allergens. This type of rash can occur on the hands, elbows, face, scalp, knees and neck, according to WebMD.
A hand rash caused by rheumatoid arthritis can appear blotchy and red. It can appear on the hands and the feet. This type of rash is not always itchy, but it can be problematic if it spreads to the abdomen and face. Rheumatoid arthritis is caused by an autoimmune condition that involves the body attacking healthy tissues, according to Healthline.
Hand foot and mouth disease is characterized by a rash on the palms of the hands, soles of the feet and in the mouth. This condition is caused by a viral infection. The rash appears as small red spots that develop into blisters, notes MedicineNet.