Appearance of red dots on the skin with a feeling of stomach upset is what disease?

Question
Hello doctor, a few years ago I ate raw lettuce and just swallowed it, I felt like something crawled in my stomach. After that, occasional red spots appear on the skin. I have been tested for some types such as roundworms, thorns, strongyloides but all negative. So, doctor, I don't know what I ate and is there any treatment for the disease?
Thank physicians sir!
Anonymous question
Answer
Hi, through the description of your condition, you should see a parasitologist at Vinmec International General Hospital for the most accurate examination, testing and advice on your situation. children, as well as see if the cause is caused by a parasite.
Thank you for sending your question to Vinmec Health System. Best regards.
Doctor Gastroenterologist - Department of Medical Examination & Internal Medicine - Vinmec Hai Phong International General Hospital.