Travel insurance

[Craig123]

I've never had to answer any medical questions when buying trip insurance (which includes medical coverage and emergency evac etc.)

Check the policy wording related to pre-existing conditions. Although the company may not have asked any questions related to pre-existing conditions, there are almost certainly exclusions and or limitations relating to them. Make sure you clearly understand the exclusions and limitations of the policy. At least you'll know where you stand before a large loss occurs.