What is the blister's on my lower stomach almost like heat blister? One night me and my gf was having sex around 6 am and after fell asleep woke up around 4 hours later and had on my lower stomach blisters look like heat blisters did not go to doctor to h

These. These could have resulted from friction, skin rubbing against skin. Another possibility when one mentions blisters is herpes. If they return see your doctor immediately for an exam and herpes culture. However, you stated they healed after taking antibiotics. This could have been a coincidence or could mean it was some type of bacterial infection. Very difficult to say. Again if they return see your doctor right away. Take care.