Homeowners who cannot move up the property ladder into their second home are causing a "bottleneck" in the housing market, the Bank of Scotland has warned.
Research found that two-thirds (65%) of those looking to buy their second home in the past year have been unable to do so.
These so-called second steppers faced a number of barriers when looking to move.
Meanwhile, three-quarters (76%) believe the Government should step in to help people trying to sell their first home.
Carol Anderson, head of mortgages at the Bank of Scotland, said people being unable to move up the ladder could have a "knock-on effect across the whole of the housing market".
She said: "First-time sellers in Scotland are now faced with some very tough challenges when trying to make their next move on the property ladder. Almost two-thirds of Scottish second steppers have wanted to climb up the ladder in the past 12 months but have been unable to do so as they face an increasing number of challenges.
"It is vital that this group of home movers receive more support and attention as they play an intrinsic role in getting the housing market moving again."
She continued: "To achieve a sustainable housing market in Scotland we need to see movement throughout the market. If second steppers get stuck on the first rung, movement at the bottom half of the ladder comes to a standstill and this bottleneck will not only restrict the supply of starter properties but will have a knock-on effect across the whole of the housing market."
The main problems for those trying to buy a second home are a lack of offers from first-time buyers (40%) and a shortage of affordable homes (31%).
Two-thirds (65%) of those looking to buy their second home worry about the size of deposit needed, often because of the amount of equity in their current property. The Bank of Scotland Second Stepper report said the typical person buying a second property needed an average deposit of £60,670 in 2011, more than double that required a decade ago.