A undergraduate student suffers more than most the morning after the night before.
Shannon Birse has a rare illness that makes every hangover last THREE DAYS.
The 19-year-old, was diagnosed with fibromyalgia last year - a painful joint condition that will affect her for the rest of her life, and means, among other things, that she suffers 72-hour hangovers every time she drinks.
There is no cure for the debilitating illness which has over 200 symptoms including chronic fatigue, intense migraines and crippling pain - five times more intense than a healthy person feels pain.
Fitting into student social life at Royal Holloway University is troublesome for Shannon, who usually takes 30 tablets to cope with her condition every day.
She has to prepare before she goes out because she can't take her medication if she's planning on drinking - meaning she suffers a lot more for it the next day, and the hangover pain lasts for three days.
She said: "At first I found it difficult because you grieve for the life you thought you could have.
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"But I'm more positive now, although I still have bad days where I feel fed up."
Speaking to student newspaper The Tab Shannon said: "Everything started in February last year.
"I came down with a virus called labyrinthitis which causes vertigo and sickness and this was treated by doctors.
"But I started getting severe joint pain and muscle pain and I was only getting two or three hours sleep a night.
"It's not even restorative sleep because my body doesn't enter into REM."
Eventually, Shannon was diagnosed with fibromyalgia in the summer, a condition which affects about 70 million people worldwide.
Despite finally getting a diagnosis for her problems, Shannon, who is in her second year at Royal Holloway University, in Surrey, said the diagnosis wasn't all good news.
She said: "Lots of people don't even get diagnosed because their doctors either don't think the illness is real or misdiagnose them.
"It was a shock to be diagnosed and find out it was incurable.
"I'd been suffering for six months before getting the diagnosis so in some ways it was nice to have a name to it.
"But it's a lifelong condition with no cure - so it was also a bad thing finding out as well."
To help ease her pain, the Criminology and Psychology student has physiotherapy and hydrotherapy.
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She also has to take painkillers, vitamins , sleeping tablets and other tablets every day, to try and improve her quality of life.
Shannon said: "All of these treatments cost a lot of money so my friends and family are doing an absail for me to try and raise money for treatment, and also to research a cure."
Although 2.6 million people in the UK have been diagnosed with the illness, Shannon, who is originally from Hertfordshire, said the worst thing about it is that it's invisible.
She said: "You can't see it in people and it hasn't been recognised by some doctors until very recently.
"It is such a difficult illness to understand."
Despite this, she said her university has been great at adapting to her needs.
She said: "Royal Holloway has been really helpful, especially with exams and coursework.
"If I need extra time to do work I just let them know - I have extra time to stretch in exams and I use a laptop so my hands don't get sore."
Despite this, she has high hopes for the future and is confident she'll be able to follow her dreams - although she still hasn't decided exactly what she wants to do.
She said: "I'm not sure if I'll be able to have a full time job in the future but I'm working really hard and I've got a good support system, so if I put my mind to something I could do it."