A hunger strike is the voluntary refusal of food, and sometimes fluids, as a form of protest. It is a deliberate act of self-deprivation used to draw attention to a cause, pressure authorities into action, or assert moral authority when other forms of resistance have failed. Hunger strikes have been used by political prisoners, detained immigrants, activists, and incarcerated people around the world for over a century.
How Hunger Strikes Work
At its core, a hunger strike is a mental decision followed by an act of omission: the striker chooses to stop nourishing their own body. Most hunger strikers refuse solid food while continuing to drink water, which is the most common form, accounting for roughly 60% of documented cases. About 38% of strikes involve absolute fasting, where the person refuses both food and water. This distinction matters enormously for survival. A person of normal weight who refuses food but drinks water can survive for two to three months. A person who refuses both food and water faces death from dehydration in approximately one week.
Some strikers accept salt, sugar, or vitamins during their fast, which can slow the progression of complications. Others refuse everything. The terms of the strike are often set by the strikers themselves or negotiated within a group, and the specific rules shape both the medical risk and the political pressure the strike generates.
What Happens to the Body
The body moves through a predictable sequence once food intake stops. In the first day or two, it burns through glycogen, a short-term energy reserve stored in the liver and muscles. Once glycogen is gone, the body shifts to metabolizing its own fat reserves from adipose tissue. This switch produces ketones as a byproduct, and the striker may notice a distinct change in their breath and body odor as their metabolism changes course.
By around ten days, glycogen stores are fully exhausted and the body begins breaking down muscle for energy. This is the dangerous transition point. Muscle loss affects not just the arms and legs but the heart, which is itself a muscle. Strikers typically become bedridden around this time. The breakdown of muscle tissue produces ammonia, which gives the body a characteristic smell that witnesses of historical hunger strikes have noted.
The central nervous system is particularly vulnerable to prolonged fasting. A study of 41 long-term hunger strikers (fasting between 130 and 324 days, with intermittent partial nutrition) found that all of them developed neurological damage consistent with Wernicke-Korsakoff syndrome, a condition involving confusion, memory loss, and problems with eye movement and balance. All 41 experienced altered consciousness lasting anywhere from 3 to 31 days, and all developed amnesia. Researchers concluded that the damage to the brain was more severe than the damage to muscles and nerves, and that recovery was only partial, suggesting permanent neurological injury.
For those who refuse water entirely, the timeline compresses dramatically. Within the first day, thirst and sluggishness set in. By the third day, organ function begins to fail. The kidneys, responsible for filtering toxins from the blood, are among the first organs affected. When they stop working, toxins accumulate and trigger a cascade of liver failure, shock, and death.
Why People Go on Hunger Strikes
Hunger strikes derive their power from a simple moral calculus: the striker puts their own body and life at stake to expose what they see as injustice. The act creates a visible, escalating crisis that authorities cannot easily ignore. As the striker’s health deteriorates, public attention and political pressure tend to increase.
The 1981 hunger strikes at Long Kesh Prison in Northern Ireland are among the most well-known examples. Bobby Sands, an Irish Republican prisoner seeking political status rather than criminal classification, began refusing food on March 1, 1981. In the early days of his strike, he wrote that the pain of not being free was far worse than any hunger pains. He also described prison officials bringing increasingly large meals to his cell, a psychological pressure tactic. Sands died after 66 days. The strike continued for a total of 217 days before the families of the remaining strikers intervened. Ten men died.
Hunger strikes have also been used by suffragettes in the early 1900s, Indian independence activists (most famously Mahatma Gandhi), prisoners at Guantánamo Bay, and detained asylum seekers in immigration facilities. The common thread is a person with little institutional power using the only thing they fully control, their own body, as leverage.
The Ethics of Force-Feeding
When a hunger striker’s life is in danger, authorities face a difficult question: should the person be fed against their will? The World Medical Association’s Declaration of Malta, the leading international ethical guideline on this issue, is unambiguous. Forced feeding is never ethically acceptable. The declaration states that feeding accompanied by threats, coercion, force, or physical restraints is a form of inhuman and degrading treatment.
The guidelines place physicians in a specific position. Their primary obligation is to the patient, not to the prison or government that employs them. Doctors must respect a hunger striker’s autonomy, meaning a mentally competent person’s informed decision to refuse food carries moral weight even when it leads to death. The declaration acknowledges the tension doctors feel between wanting to save a life and respecting that person’s right to protest, but it comes down firmly on the side of autonomy.
There are narrow exceptions. If a striker becomes unconscious and has not left clear advance instructions refusing nutrition, artificial feeding may be acceptable to preserve life or prevent severe irreversible disability. But the declaration specifically prohibits rectal hydration under any circumstances and condemns the practice of force-feeding some detainees to intimidate others into ending their strikes.
Legal systems have not always aligned with these medical ethics guidelines. In at least one U.S. case, a judge permitted force-feeding on the grounds that the striker’s motivation was to frustrate the authority of the courts rather than to express a sincere political or religious conviction. This reasoning, distinguishing between “legitimate” and “illegitimate” motivations for self-starvation, remains controversial.
The Danger of Eating Again
Surviving a hunger strike does not mean the danger is over. Refeeding syndrome, a potentially fatal complication, can occur within the first five days of eating again. When a starved body suddenly receives food, its metabolism shifts rapidly back to processing carbohydrates. This shift causes a massive movement of electrolytes from the bloodstream into cells, and the resulting imbalance can affect the heart, lungs, brain, and muscles.
What makes refeeding syndrome especially treacherous is that electrolyte deficiencies may not appear on a blood test before eating resumes. The body doesn’t reveal the full extent of its depletion until it tries to use those electrolytes again. For this reason, medical teams monitor vital signs and check electrolyte levels daily during refeeding, reintroducing calories slowly and carefully rather than allowing a person to eat freely right away.
The complications can include seizures, heart failure, and respiratory problems. For long-term hunger strikers, the refeeding process can take weeks of gradual caloric increase under close supervision.