Hi.. Can understand your concern.. As per your complain in case if you are prone to getting cold sores which is a viral infection caused by herpes simplex virus 1 then it is possible that you transmit the infection to your partner while kissing as in case if there are no outbreaks on the skin also there are chances that there is present of virus on the surface of skin and can be communicated to your partner and he can also become a carrier of infection.. At any point of time as the virus will proliferate there can be an outbreak to you or your partner.. The virus if present in dormant stage also can be transmitted to the genitals via oral sex.. There are different tests like Polymerase chain reaction, viral culture,antigen-antibody tests to find out the virus in the body and on the effected area.. You both can get them done after consultation with your physician as per requirement and treatment can be planned accordingly if needed.. Hope this information helps.. If you find the answer helpful kindly write a positive review and click on found this answer helpful as a token of appreciation.. Thanks and regards.. Dr.Honey Nandwani Arora.