Why is My Hamster Lying Flat on its Stomach? Is Your Hamster Sick or Relaxing?

Hamsters are fascinating creatures with unique and adorable personalities. They’re known for their cute and cuddly appearances and energetic behaviors. But when you notice your hamster lying flat, it can be concerning and confusing.

So, why is my hamster lying flat on its stomach? One of the most common causes is that they are just relaxing. However, it could also indicate a health problem, such as feeling weak and uncomfortable. Other possible causes include environmental stressors, aging, injury, and heat stroke. 

This article will explore these and other potential causes of flat-lying hamsters. We’ll also provide tips and strategies to prevent or address these problems. So, let’s get started!

Why is My Hamster Lying Flat on its Stomach? Here are the Answers

Here are some of the possible reasons why your hamster might be lying flat on its stomach:

Why is My Hamster Lying Flat on its Stomach

1. Environmental Stressors

Signs that your hamster is experiencing stress include 

  • A lack of appetite
  • Lethargy 
  • Lying flat 
  • Hiding 
  • Aggression 
  • Abnormal behaviors

Environmental stressors can come from a variety of sources. Some include a noisy environment, poor living conditions, and sudden changes in temperature or humidity. 

2. Heat Stroke

Heat stroke occurs when the body cannot regulate its internal temperature, leading to organ failure and even death. There are several reasons hamsters might be at risk of heat stroke. They include exercising in hot weather or staying in a warm or poorly ventilated area.

The hamster may also be panting, have a rapid heartbeat, or be lethargic and unresponsive in heat stroke. 

Hamster Heat Stroke

3. Dehydration

Several factors, such as insufficient water, hot weather, or illness, can cause dehydration in hamsters. Other symptoms besides lying flat include dry mouth, sunken eyes, lethargy, and loss of appetite. 

The reason that hamsters lie down during dehydration is that they feel weak and lethargic. Their body cannot function normally due to the lack of fluids, and they need to rest and conserve energy. 

4. Injury

Injuries can be caused by falls, fights with other hamsters, or accidents in the cage. Signs of injury in hamsters include limping, blood or discharge from the nose, mouth, and reluctance to move or play. 

Improper handling can also cause physical harm to your hamster and cause it to lie down.

Hamster Injury

5. Perceived Danger

Hamsters might lie down when making themselves appear smaller and less noticeable. Hamsters are prey animals. They often try to hide or lie flat when they feel threatened or scared. 

6. Aging

As hamsters age, they experience various health problems that can cause them to lie flat and exhibit other unusual behaviors. Common issues affecting older hamsters include arthritis, dental problems, and vision loss.

Other signs of aging include stiffness and difficulty climbing or walking.

7. Genetic Predisposition

Some hamsters may be predisposed to lying flat, even if they appear otherwise healthy. So, if your pet is lying flat and shows no signs of heat stroke or other health problems, don’t panic. It could be a genetic predisposition to the trait. 

Hamster Genetic Predisposition

8. Other Health Issues

Other hamster diseases like respiratory infections, parasites, dental problems, malnutrition, and diseases can all be to blame for lying flat. 

9. Relaxation

Hamsters are active animals and enjoy running around and playing, especially at night. After an intense play session, your hamster may become exhausted and require rest. Lying down flat on their stomach is a way for them to relax and recuperate.

Taking Action: What to Do When Your Hamster Lies Flat

Here are the measures to take when you identify this trait:

What to Do When Your Hamster Lies Flat

1. Assess the Situation

Take a moment to note any possible causes that could have led to the behavior. 

  • Have there been any environmental changes, such as temperature or diet? 
  • Have you noticed any signs of stress? 
  • Have there been any physical injuries, or has your hamster been in a fight with another pet? 

If you cannot identify any signs of illness or injury, it could be a temporary problem. Otherwise, you must take immediate action to save your pet’s life. 

2. Provide a Stress-Free Environment

  • Ensure your hamster’s cage is located in a quiet, low-traffic area of your home, away from loud noises and other animals. 
  • Provide plenty of bedding and hiding places for your hamster to feel safe and secure.
  • Also, provide a spacious cage with tunnels, hideouts, and toys to entertain them. 
  • Avoid overcrowding and give your hamster plenty of space to move around.
Hamster Provide a Stress-Free Environment

3. Ensure Adequate Ventilation and Temperature Control

Your hamster’s living space should be well-ventilated and kept at a comfortable temperature. Hamsters are sensitive to temperature changes. 

  • So, we recommend keeping their cage at a temperature range of 65°-75°F (18°-24°C). 
  • Also, avoid placing your hamster’s cage in direct sunlight or near heating or cooling vents.

4. Provide Fresh Water and a Balanced Diet

A well-balanced diet is essential to your hamster’s health. 

  • Provide them with various fresh fruits and vegetables, pellets, and seeds. 
  • Clean and replace their food and water daily to ensure they have access to fresh and clean food and water. 
  • A hamster should take 10 to 30ml of water daily. Increase this size if they are super active. 

5. Clean Their Cages

Hamsters can be sensitive to unpleasant odors and dirty surroundings, which can cause stress and anxiety. 

  • Regularly cleaning your hamster’s cage is essential to prevent bacteria and odors buildup. 
  • We recommend cleaning their cage at least once a week, replacing all bedding and washing their toys and accessories.
Hamster Clean Their Cages

6. Handle your Hamster Gently

Hamsters are delicate creatures that require gentle handling to prevent injury or distress. Sudden movements or loud noises can startle them.

  • So, always handle your hamster gently, supporting them properly and never grabbing or squeezing them. 
  • When interacting with your hamster, be patient and calm to ensure they feel safe and secure. 

7. Be Mindful of Any Changes in Behavior or Health

As a responsible hamster owner, it is crucial to be vigilant and observe any changes in your hamster’s behavior or health. If you notice your hamster lying flat more frequently or showing signs of illness, seek veterinary attention immediately.

If you’re a hamster owner, you might be wondering about the proper size of their cage or if sticky eye can be fatal for them. At RodentsFact, we have articles on how big should a hamster cage be and can sticky eye kill a hamster. Our article on how big should a hamster cage be covers the ideal size and features of a hamster cage, while our article on can sticky eye kill a hamster explores this common health issue and its potential risks for your pet. By learning about these aspects of hamsters, you can provide the best care for your furry friend and ensure their well-being.


Here are answers to common questions about hamsters lying flat:

Q: What is the Normal Hamster Sleeping Position?

Hamsters can sleep in different positions, such as on their side, curled up in a ball, or stretched out flat. No particular sleeping position is considered “normal” for hamsters. You should only be concerned if the hamster is lying flat and not responding to your attempts to wake them up.

Q: Should you Wake a Hamster Lying Flat?

If your hamster is lying flat and not responding to your attempts to wake them up, it is best to seek veterinary attention immediately. This may indicate a serious health issue, such as heatstroke or illness. In general, hamsters need their rest. So, it is essential to allow them to sleep when they need to.


If you were asking, “why is my hamster lying flat on its stomach?” the answer is not always straightforward as seen above. While it may simply be a sign of relaxation, it can also indicate more serious issues like heat stroke or other health problems. 

By following the tips and guidelines outlined in this article, you can ensure that your furry friend stays happy and healthy. So keep calm, stay alert, and give your hamster all the love and attention they deserve!

Lisa G

Meet Lisa G, the founder and author of RodentsFact.com. With over 3 years of experience studying and observing various species of rodents. Lisa has established herself as a credible expert in the field. Her passion for these often-overlooked animals shines through in her in-depth articles and engaging writing style. Follow her blog to learn fascinating facts and gain a new appreciation for the furry creatures that share our world.

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