###Human: I am suffering from nausea, headache, and chest pain after having cold foods. Why? ###Assistant: Hello. You feel those symptoms when you take cold foods, and so you may likely be having symptoms of common cold and malaria. The chest pain could be a symptom of an ulcer. There may also be fever, I presume. You can run a test for malaria (blood film) if it is positive then treat it. Tablet Artemether Lumefantrine 80/480 mg b.d (twice a day) for three days, tablet loratadine 10 mg b.d for five days, tablet vitamin C 2 t.d.s (thrice a day) for five days. Add tablet Rabeprazole 20 mg b.d in case of ulcer.