It could be but to differentiate it a pic will be of great help.
Is it possible it could be fungus! It itches bad!
Itching on the dominant hand is typical for 'Cumulative insult dermatitis'. Perhaps some Vaseline would help. Hydrocortisone, yes- just to tide over.
Regards.
sounds like you are allergic to something you are using like a hand cream or soap, try some hydrocortizone cream