No, provided there has been no medical treatment or symptoms during the look back period. The specific definitions for a pre-existing condition vary from policy to policy and can be found in the policy certificate. Most travel insurance policies have a look back period of 60 – 180 days. For most travel insurance policies, a condition in not generally considered pre-existing if the condition is controlled solely through the use of medication, provided there has been no change to the medication during the look back period. Travel medical plans have a much longer look back period, usually 1 – 3 years.