How long after eating seafood can one eat ice cream?
Generally, it is recommended to wait between half an hour to two hours after eating seafood before consuming ice cream, with the specific timing varying from person to person. The analysis is as follows:

For healthy adults with normal digestive system function and no special medical conditions, eating ice cream half an hour after seafood typically does not cause noticeable discomfort. This is because the dairy content in ice cream can neutralize some of the fishy odor of seafood, and alternating between hot and cold foods generally does not place a significant burden on the digestive systems of most people.
If an individual has weak digestion or suffers from gastrointestinal discomfort, diarrhea, or other digestive issues, it is not advisable to eat ice cream immediately after consuming seafood. Seafood is generally cooling in nature and rich in protein, while ice cream is also a cold food. Consuming these together or in quick succession may lead to indigestion, stomach pain, diarrhea, or other symptoms. In such cases, it is recommended to wait approximately two hours, ensuring the seafood has been sufficiently digested before eating ice cream.
Patients with lactose intolerance lack sufficient lactase enzyme to break down lactose, and consuming ice cream containing lactose may cause discomfort. Therefore, this group of people should avoid eating ice cream after consuming seafood.