Hello and Welcome to ‘Ask A Doctor’ service. I have reviewed your query and here is my advice. No I am afraid it is not the symptoms of sun stroke but it could be due to hypoglycemia but the redness of eye is not likely, it could be allergic condition, or it may be due to hot whether, I would advise you to get done the plasma glucose test else it is nothing to worry. Hope I have answered your query. Let me know if I can assist you further.