I'm worried about my Mum and would be grateful for advice. She's had type 2 for years. She's on Metformin and Glympiride. She has neuropathy in both legs up to the knee and higher on one leg. She checks her blood sugar several times a day. I've been looking through the forum postings and see that hypos are pretty common. However, she doesn't get them in the day but most nights at 2am she's sweating profusely and finds she's down to 2.3 or so. She keeps snacks by the bed. Last week she got out of bed and her legs collapsed. Fortunately my brother was here at the time. The doctor is concerned and suggested supper and not taking metformin too late in the day. Yesterday she took it at lunchtime and had a fruit scone at 10:30 before bed. She still had a hypo at 2am. At 06:30 this morning it was still very low. I saw chronic hypo mentioned on the diabetes UK website, but it didn't provide any further info about it. I'm staying at the moment and visit a lot but live a long way away. She's recovering from an infection at the moment, but even when well has lots of hypos. Is this serious or pretty normal?