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It seems like you have scabies
. It is a skin infestation by an itch mite. It usually spreads from one person to another by close contact. Please screen family members for similar itchy rash
. The commonly affected areas are web spaces of hands and feet, underarms, wrists, inner thighs, genital region, around belly button.
Consult a dermatologist
. He will treat you. Permethrin 5 % cream works well. You need to take anti histamines
for a week even after treatment because the itching may persist for some time. All your contacts in the family should be treated together to prevent relapse. The precautions of treatment explained by dermatologist should be followed properly.
Hope this helped