I'm an adult w/ hand, foot, & mouth for the 2nd time in 12 months. should i go see a doctor to find out if something is wrong w/ my immune system?

Hand-foot-mouth viral: Different enteroviruses cause it. The most common is Coxsackie virus A16 (named after the New York town where it was discovered); the next most common is enterovirus 71. You might have caught both. Vesicles or red spots on the palm and/or soles of the feet + sores on mucous membranes of the mouth are the diagnostic signs. Fever and sore throat common. Are these your symptoms? Self limiting.