'Why am I old and fat?' Man, 37, wakes up thinking he's still in High School after forgetting the past 20 YEARS including that he was married and had a 10-year-old daughter

• Daniel Porter, 36, from Texas, lost 20 years of memories due to a brain condition
• He woke up next to his wife Ruth, 37, in July last year with no idea who she was
• The father-of-one has been retaining his memories since last year
• He still has no recollection of the 20 years before that including his wedding day and birth of his daughter Libby, 10
• When Daniel looked in the mirror, he asked why he was 'old and fat' 

A father woke up one morning thinking it was the 1990s after losing 20 years of memories - including his marriage and daughter - because of a rare brain condition.

Daniel Porter, 36, from Granbury, Texas, woke up next to his wife, Ruth, 37, in July last year with no idea who she was or where he was.

The hearing specialist thought he was 16 and it was time to get ready for school, and he had no memory of his wife lying next to him or their daughter Libby, 10.

Ruth had to convince Daniel that he hadn't been kidnapped and that she was his wife, but only with the help of his parents.

He even became angry when he first looked in the mirror, asking why he was 'old and fat'. 

Doctors diagnosed that he was suffering Transient Global Amnesia - which is usually a sudden, temporary interruption of short-term memory - and that he would be back to normal within 24 hours. But a year on the majority of his life remains a blank. 

Daniel Porter, 36, from Granbury, Texas, woke up next to his wife, Ruth, 37, in July last year with no memory of his wife Ruth, 37, or daughter Libby, 10