Most standard travel insurance policies do not cover serious medical conditions which means, you wouldn’t be able to claim if you needed emergency treatment abroad or if you had to cancel your trip as a result of your condition.
A specialist policy, such as Free Spirit, will cover your medical condition(s) (subject to medical screening) so that you have full protection both before and during your trip. As with all policies, terms and conditions will apply so you will need to read the policy wording.
If you already have travel insurance in place, it is worth checking it covers your existing medical condition(s).