14 Most Common Symptoms of Salmonella

2. Diarrhea

Diarrhea often appears as one of the first and most common symptoms of Salmonella infection. It usually starts suddenly and can range from mild to severe. The stool may be loose, watery, or sometimes contain mucus or a small amount of blood.

The infection irritates your intestines and hinders the ability of your body to absorb water and nutrients. Your body tries to get rid of the bacteria by pushing out waste quickly, which leads to frequent bowel movements and leaves you feeling weak or drained.

Diarrhea from Salmonella infection often lasts about 4 to 7 days. In some cases, it can continue for several weeks if the bacteria remain in your intestines. Staying hydrated is important because your body loses water and salts each time you have watery stools.

Signs of dehydration include dark urine, dry mouth, dizziness, or feeling very thirsty. Children, older adults, and people with weaker immune systems are more likely to get dehydrated. Drinking plenty of fluids or oral rehydration solutions is a common way to replace lost fluids and prevent serious problems.

3. Fever

You may notice a fever soon after a Salmonella infection begins. Your immune system raises your body temperature to fight the bacteria, and the fever usually appears within a day or two after symptoms like stomach cramps or diarrhea start.

Your temperature may rise to around 100°F (37.8°C) to 102°F (38.9°C). Chills, body aches, or sweating sometimes accompany this rise. The fever usually lasts a few days and goes away as the infection clears. If it stays above 102°F (38.9°C) or lasts more than a few days, it may signal a more serious infection.

Rest and hydration help your body recover. Drinking water or oral rehydration fluids lowers the risk of dehydration caused by fever and diarrhea. Over-the-counter fever reducers may also help lower temperature and ease discomfort.

Close monitoring of the fever is often necessary for children, older adults, or individuals with a weak immune system. These groups can become sick faster and may need medical care sooner. Checking temperature regularly helps you notice changes quickly and act if needed.

4. Abdominal Pain

You might feel abdominal pain when you have a Salmonella infection because the bacteria irritate your stomach and intestines. The discomfort can range from mild to severe and often comes with cramping or tenderness in the lower belly. It may start a few hours after eating contaminated food or may appear within a couple of days.

Your digestive system reacts to infection by making your intestines tighten and move more often to push out the bacteria, which leads to cramps. You may also feel bloated or notice that the pain gets worse before each bowel movement.

The pain often lasts several days while your body fights the infection. Drinking water and eating small, bland meals can help reduce discomfort. Resting and giving your stomach time to settle often makes recovery smoother.

5. Nausea

You may feel nauseated soon after infection with Salmonella. This uneasy feeling in your stomach often appears before vomiting or loss of appetite and may last for several hours or days. The bacteria irritate the stomach and intestines. This irritation often triggers the urge to empty the stomach. Even if you do not throw up, the discomfort can result in the avoidance of food and fluids.

For most people, nausea from Salmonella is temporary and improves as your body clears the infection. Rest, hydration, and eating plain foods like toast or rice can sometimes make you feel better. These simple adjustments allow the digestive system to recover at its own pace without further irritation from heavy or spicy meals.

An inability to keep fluids down or a worsening of nausea often warrants a consultation with a healthcare provider. Severe or prolonged nausea may lead to dehydration, especially if paired with vomiting or diarrhea.

6. Irritable Bowel Syndrome

Irritable Bowel Syndrome, or IBS, affects how your intestines work. It can cause abdominal pain, bloating, and changes in bowel habits. You might have diarrhea, constipation, or both at different times. IBS does not cause infections like Salmonella, but it can develop after a foodborne illness.

Some people experience an ongoing sensitive gut even after recovering from infections. This is sometimes called post-infectious IBS. This condition means the digestive system stays more reactive to stress, diet, or hormonal changes for an extended period after the initial illness has cleared.

Common symptoms of IBS include cramping or discomfort in the stomach area and gas or bloating that makes the belly feel full. Changes in stool consistency or frequency are also common indicators of this condition. Many people experience a sense of relief after they pass stool, which is a typical characteristic of the syndrome.

7. Dry Mouth

You might notice your mouth feeling dry when you have a Salmonella infection. Diarrhea and vomiting cause your body to lose water quickly, so your salivary glands may not make enough saliva to keep your mouth moist.

A dry mouth can make it harder to swallow or talk. Your tongue might feel rough or sticky, and food could taste different. In some cases, your lips and throat may feel dry or sore. Keeping hydrated helps prevent this symptom from getting worse.

Frequent water intake and the selection of fluids such as oral rehydration solutions help to replace fluids and minerals. The avoidance of drinks high in sugar or caffeine is beneficial because these beverages can worsen dryness. If you take medicines that lower saliva production, your dry mouth may feel more intense during the illness.

8. Muscular Pain

You might feel soreness or aching in your muscles when you have a Salmonella infection. This discomfort often appears with fever and weakness, and it makes your body feel tired and heavy. Muscular pain usually affects areas like your back, arms, and legs because your immune system is fighting the infection.

The pain may feel similar to the muscle aches that come with the flu. Your muscles can feel tender to the touch or sore when you move. Rest and hydration can help lessen the discomfort. The body often redirects its energy toward the immune response, which contributes to this physical soreness. The pain usually goes away after the infection clears. Mild stretching and light activity can help reduce stiffness once you start feeling better.

9. Chills

You may feel chills when your body tries to fight off a Salmonella infection. These chills often come with a fever and can make you feel very cold, even if the room is warm. They usually start suddenly and may come and go while your temperature changes.

Your body heats up to kill the bacteria, and as your temperature rises, you may shiver or feel your muscles shake. This reaction helps your body make more heat, which can leave you feeling tired afterward.

Many people experience chills along with other signs such as sweating, headache, or weakness. These symptoms often appear within a day or two after eating contaminated food or water. You can make chills less uncomfortable by resting, drinking fluids, and keeping your body at a comfortable temperature. Staying hydrated is especially important when you also have diarrhea or vomiting, which can cause fluid loss.

10. Headache

You might experience a headache when you have a Salmonella infection. Your body reacts to the infection with a mild fever, dehydration, or overall weakness. When you lose fluids from diarrhea or vomiting, your brain may become slightly dehydrated. This dehydration results in pain or pressure in your head.

The pain may feel different for each person. Some people notice a dull, steady ache around the forehead or temples, while others describe a heavier feeling behind the eyes or at the back of the head. These aches are usually not severe but can make you feel more tired or irritable.

Drinking water or oral rehydration drinks helps replace lost fluids. Taking an over-the-counter pain reliever may ease the pain, but only use it as directed. Resting in a quiet and dark place may also help if your headache is made worse by noise or bright light.

11. Dehydration

Salmonella infection often leads to diarrhea and vomiting and causes the body to lose large amounts of fluids. This fluid loss can result in dehydration. This state makes it harder for the body to keep blood pressure stable, move nutrients, and control temperature. Children and older adults face a higher risk because they lose fluids more quickly.

You might notice signs of dehydration such as feeling dizzy, having a dry mouth, or producing very little urine. Your urine may appear dark yellow. You may also feel very thirsty and tired.

If you lose too much fluid, your heart and other organs must work harder. This extra effort often results in a weak and confused feeling. The intake of plenty of water or solutions that replace electrolytes helps to restore balance. Rest and the avoidance of drinks high in sugar or caffeine also support the recovery process.

Several warning signs indicate a need for attention. These include little or no urination, dry lips and tongue, and sunken eyes. Dizziness, lightheadedness, fatigue, or confusion are also common indicators that the body lacks sufficient fluids.

12. Inflammatory Complications

Salmonella infection can cause inflammation that spreads beyond your intestines when bacteria enter your bloodstream. These conditions are less common but can cause more serious health problems. In some cases, the infection reaches the joints and causes reactive arthritis. This condition results in joint pain, stiffness, and swelling.

The discomfort may last for weeks or sometimes much longer. You might also notice redness in your eyes or pain when urinating, which can happen together with joint issues. Inflammation can also affect your bones, brain, or tissues around the spinal cord.

Symptoms depend on the body part involved. Bone infections cause pain and swelling in one area, while brain or spinal tissue infections can lead to headaches, confusion, or neck stiffness, which require quick medical care.

The recovery from these inflammatory complications often takes more time than the initial digestive symptoms. Close observation of any new or persistent pain is helpful during the weeks after the infection clears.

13. Blood Complications

Salmonella sometimes moves from the intestines into your bloodstream and causes bacteremia. This can be serious because the infection can then reach other organs like your heart, bones, or brain. These cases are rare but may lead to long-term health problems if untreated.

When bacteria enter the blood, you may feel chills, fever, or weakness. Some people experience fast breathing or confusion. These signs may appear after stomach symptoms improve. This timing often makes a connection to the original infection more difficult. A quick consultation with a doctor is necessary if you notice these symptoms.

The infection can lead to several blood-related conditions. Sepsis occurs when the body has a strong response to the infection and results in widespread inflammation. Endocarditis is an infection of the heart’s inner lining or valves that affects blood flow. Additionally, osteomyelitis is an infection that spreads from the blood into the bones.

14. Treatment

Most people recover from Salmonella infection without medical treatment. Rest and the intake of plenty of fluids such as water, clear broths, or oral rehydration solutions help to prevent dehydration. The consumption of small, light meals like rice, toast, bananas, or applesauce is helpful as you feel better. The avoidance of spicy, oily, or dairy-heavy foods is beneficial until the stomach settles.

Doctors sometimes recommend antibiotics for severe or complicated cases, using drug classes such as macrolides or fluoroquinolones. In mild infections, they usually avoid antibiotics because these drugs can prolong symptoms or increase the risk of antibiotic resistance.

The use of anti-diarrheal drugs is generally avoided unless a doctor approves them. These medicines can slow recovery because they keep bacteria in the intestines for a longer duration. Frequent hand hygiene, the sanitation of surfaces that may have germs, and a period of rest at home until symptoms stop are standard precautions.