51 years on insulin in Oz: I looked up the 'profile' of the insulins I was on. If you google graphs or pictures of insulin profiles and look at the short acting one you have been prescribed you will see a 'peak' of insulin's action or effect which is often around the 2 1/2 to 3 hour mark. If something like that is the case it could be that your glucose spike from, say, breakfast occurs ahead of the insulin peak action. So you spike hi and then belatedly your insulin 'thumps' the blood sugar down. It is like a mistiming in a car's ignition.You will appreciate from this that increasing the dose of short acting insulin may not help, only make the low sugars worse. You can have less carbs for, say, breakfast and that may ease the glucose spike but the insulin may then thump your blood sugar down even more. . The solution in general terms is to either slow down the glucose spike so that it occurs a bit later and is not so spiky high AND possibly with your DN or doc's approval ease back your short acting insulin. There may be a even quicker acting insulin to use as another option.There may be other things contributing if you are also taking long acting insulin so you need to run all this past your DN and doctor. Your DN in the first instance can discuss your meals with you to see whether a change in say breakfast cereal to sometime more slowly absorbed OR adding in something which delays how quickly the cereal or whatever carbs moves from your stomach into the small intestine where the glucose is absorbed. What you have in my experience is a glitch, uncomfortable and distressing yes, but fixable and manageable. It is all a learning experience. I have not stopped learning either !!