How do i know when i need to see a doctor about my cold to get antibiotics?

Never, however...: The common cold is caused by viruses. Antibiotics don't help at all and will do more harm than good by killing your normal flora. The best treatment may be a herb from South Africa, Umckaloabo; see http://tinyurl.com/moytw3n Vitamin C and homeopathy can help too. Sometimes people get a secondary bacterial infection on top of a cold. If symptoms persist more than a week with a fever see a doctor.