 [ Symptoms ] are people with schizophrenia dangerous to themselves or others [ Disease ] as much as i would like to help you with your diagnostic dilemma it is not possible to blindly determine the nature of yoru hand lumpblisters based solely on a description this requires a hands on medical examination    obviously not something that can be accomplished over the internet there is really a high probability that this is an infection one that may require antibiotics so i would suggest that you seek medical evaluation as soon as you can