I have open like blister sores..appeared suddenly... very sore, burn & itch. i googled symptoms and it says impetigo. would i need an antiobotic?

Maybe: Impetigo is usually a kid disease while pubertal skin changes make it less likely in adults. You may have a blistering skin infection or they may arise from bites or an allergic response. You can treat them initially by blotting with hydrogen peroxide (kills staph)/drying & applying an OTC antibiotic ointment or cream. If they persist or worsen have the issue evaluated.