They are a staple in any fashion-conscious woman's wardrobe, coming in a rainbow of colours and shades, giving them the power to transcend the seasons.
Taking the place of the 70s flare, or the 90s bootleg cut, skinnies are the iconic jean of the noughties.
A study warns trousers that are too tight can cause health problems, triggering 'compartment syndrome', causing damage to the nerves and muscles in the legs.
OUT OF SIGHT, OUT OF MIND - SKINNY JEANS HIDE THE FAT
Ms Margo told MailOnline: 'Skinny jeans feel good and look great and I am as addicted to them as anyone, but there is a downside.
‘They hold in and support the quadriceps (thigh muscles), buttocks and core muscles in your tummy, and do the job the muscles are supposed to do.
‘As a result, the muscles are allowed to relax and switch off, so when we reveal our bodies for the first time as summer approaches, they are not as svelte or firm as they otherwise would be.’
THEY TRIGGER A BUILD-UP OF PRESSURE
Skinny jeans are particularly tight around the stomach, hips, knees and ankles, causing a build up of pressure in these areas, if they are worn for a long time, Ms Margo noted.
'If you do a lot of squatting over a prolonged period of time in skinny jeans, there is therefore an increased risk of damaging the muscles and nerves in the leg, known as compartment syndrome.
ARE SKINNY JEANS AS BAD AS SITTING?
'Standing up you burn 0.7 per cent more calories per minute than you do sitting.
'So, the message is it is vitally important to keep moving, especially if you're wearing your skinny jeans.'
'It's that out of sight, out of mind mentality - if you can't see your legs changing shape, you won't realise the gravity of the situation.
'It can make you feel good, and as a result you are less likely to then have the motivation to go to the gym or exercise. It's a vicious circle.'