The complaints you have described seemmost liklely due to a condition called Dyshidrotic Eczema.It is a condition in which small, red spots/ blisters develop on the hands and feet.It is a recurrent or chronic relapsing form of vesicular palmoplantar dermatitis of unknown etiology.The cause is unknown.
Other possibility are of dermatitis,Osler nodes or Janeway Lesions.
A hypersensitivity reaction (similar to an allergy) occurs in the skin, causing inflammation. The inflammation causes the skin to become reddish & itchy.
Without seeing your skin it is difficult to make a diagnosis. Exact diagnosis cannot be made online in this case.
So I advice you to make an appointment with your doctor.
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