<s>[INST] Why is my cold lasting so long? [/INST] If your cold lasts longer than three weeks, it may be that your cold has progressed to something more serious and you should consider consulting your doctor. It might also be a good idea to get advice from a GP if you're concerned about your baby or an elderly person, or if you have a long-term illness such as a lung condition. Source: Holland & Barrett. Link: https://www.hollandandbarrett.com/the-health-hub/conditions/cold-flu/colds-and-flu-what-you-need-to-know/. Field: General Medicine. Disease: Cold </s>