Lots of people worry about having hypos in public places or whilst they are alone, but there are steps which can be taken to avoid this happening or to minimise risk if it does. Do you generally have hypo warning symptoms before you have a hypo? If you do then by making sure you always carry some treatment and your blood glucose monitor when you go out, then you should be able to quickly treat the hypo before you become faint or unable to treat it yourself.
If you have no warning before a hypo or have difficulty in recognising the symptoms, then it is really important that you talk about this next time you visit the diabetes clinic, or get in touch with your nurse before that if you can. Your doctor/diabetes nurse should be able to help you learn how to recognise a hypo or to try and regain awareness of your symptoms. If no-one is around to treat your hypo and you faint or are unable to treat it yourself, then you shouldn't come to any immediate harm. In public places like shopping centres, there should always be a first aider on site.
They will not necessarily know that you are having a hypo or how to treat one, but they will ensure you get help from the ambulance service and stay with you while one is called. It is a really good idea to have medical ID on you so that the paramedics know you have diabetes and so know to check your blood glucose levels. Even if you were alone when you have a hypo and you do become unconscious, you will eventually come round naturally from that, in the vast majority of cases, as your body will produce glucose. You might find that your blood glucose levels are then too high and you may feel unwell for a while, so it is always best to let someone know after this has happened just so you can get checked over and hopefully get some advice about what might have caused it and how you could stop it from happening again.