14 Most Common Symptoms of CRPS

2. Sensitive Skin

You may notice that your skin becomes very sensitive in the affected area. Even a light touch can cause sharp or burning pain. This reaction often feels much stronger than it should. Simple contact can trigger discomfort, and even normal sensations may seem intense or overwhelming.

Clothing brushing against your skin, a light blanket, or even a small breeze may cause pain. This is called allodynia, which means you feel pain from something that normally would not hurt. Your skin may also react to small changes in temperature, such as warm water, cool air, or a slight shift in the room.

You might avoid touch without thinking because your body expects discomfort. This sensitivity often stays in one limb, such as your hand or foot, but it can spread to a larger area over time. Daily tasks like getting dressed, showering, or resting your arm on a table may feel difficult and distressing.

3. Changes in Skin Temperature

You may notice that the skin on the affected limb feels much warmer or colder than the rest of your body. This change can happen without warning and may shift from warm to cold within minutes or hours. In early stages, your skin may feel hot and look red, and later it may turn cool and pale.

Common temperature changes include one hand or foot feeling colder than the other, sudden warmth in the affected area, skin that feels cool and sweaty at the same time, and ongoing coldness that does not match the room temperature. CRPS affects how your nerves control blood flow, and your blood vessels may tighten or widen in an uneven way.

You might notice that temperature shifts increase your pain. Even a small drop in room temperature can make the area ache or burn more, and light touch may feel sharper when the skin is cold. These changes often affect one limb, such as an arm, hand, leg, or foot, but can spread over time.

4. Changes in Skin Color

You may notice clear changes in the color of your skin in the affected area. The skin can turn red, purple, blue, or pale without warning. These changes may come and go, or they may last for long periods and appear at different times of the day.

Color shifts often link to problems with blood flow. When blood vessels tighten or widen too much, your skin tone can change quickly. One moment your limb may look flushed and warm, and later it may appear pale or bluish and cool. The difference may stand out when you compare it to your other limb.

These changes usually affect one arm or one leg, and the skin can look blotchy or uneven. Temperature changes often happen at the same time, and small shifts in room temperature can trigger a visible change. Stress, movement, or light touch may also cause the color to deepen or spread.

5. Changes in Skin Texture

Changes in your skin texture are common with CRPS. The skin in the affected area may feel different from the rest of your body. You may notice these changes early, or they may develop as the condition progresses. The difference can become more noticeable over time.

Your skin may become thin, shiny, and tight, almost as if it is stretched. At other times, it may feel rough or dry and may peel or crack more easily. Light contact can feel uncomfortable because the skin becomes very sensitive. The area may also become very sweaty or unusually dry.

These texture changes often happen along with shifts in color or temperature. The skin may look red, pale, or bluish, and it may feel warmer or colder than the opposite limb. Hair and nails in the same area can change as well, and nails may become brittle, ridged, or weak.

6. Changes in Nail and Hair Growth Patterns

CRPS can change how your nails and hair grow in the affected limb. These changes may appear within weeks or months after your symptoms begin. You may notice that growth no longer follows your usual pattern and seems uneven or unpredictable.

Your nails may grow faster than normal at first, or they may grow more slowly and become brittle. You might see ridges, grooves, or a rough surface, and nails can become thin and break easily. These changes can make daily tasks harder if your nails feel weak or split often.

Hair growth can shift in a similar way. You may notice thicker or darker hair in the early stages, and later the hair may thin out or stop growing in the painful area. These signs often appear along with swelling, sweating, or shiny skin.

7. Swelling and Stiffness in Affected Joints

You may notice swelling in the joints of the limb affected by CRPS. The area can look puffy or feel tight, and this swelling often lasts much longer than expected after an injury. Fluid can build up around your joints and soft tissues, which makes bending or straightening the joint harder.

Common changes include visible swelling around the joint, a tight or stretched feeling in the skin, reduced range of motion, pain when you try to move, and skin that feels warm or cool around the joint. Even small movements can cause pain, and stiffness often develops along with the swelling.

Your joints may feel hard to move after you rest or wake up. Ongoing swelling and stiffness can affect how you use your limb, and you may avoid certain movements because they hurt. This reduced use can weaken nearby muscles and make daily tasks more difficult.

8. Decreased Ability to Move the Affected Body Part

You may find it hard to move the limb affected by CRPS. The pain can make even small movements feel intense and overwhelming, and you may avoid using that body part because it hurts too much. Over time, less movement can make the problem worse.

Stiffness often develops in nearby joints, and swelling and tight muscles can limit how far you can bend or straighten your arm, hand, leg, or foot. You may also notice weakness as muscles shrink and lose strength. Simple tasks like holding a cup, buttoning a shirt, or walking across a room may become difficult.

In some cases, the limb may feel frozen or stuck in one position. Your fingers or toes might curl, or your hand or foot may stay in an awkward posture, which can affect balance and coordination. Common problems include trouble bending joints, muscle weakness, stiffness, limited range of motion, and poor coordination.

9. Loss of Range of Motion in Joints

You may notice that your joints feel stiff and hard to move. This loss of range of motion often affects the same limb where you feel pain, such as your wrist, fingers, ankle, or knee. The joint may feel tight and less flexible than before.

Pain can cause you to avoid moving the joint, and less movement can lead to more stiffness over time. Swelling around the joint can also limit how far you can bend or straighten it. You might find simple tasks like buttoning a shirt, gripping a cup, or walking across a room take more effort.

CRPS can also cause muscle spasms or shaking, which can pull on the joint and make movement harder. Muscles may shrink from lack of use, which reduces strength and motion. Ongoing stiffness can affect your balance and coordination, and you may rely more on your other limb.

10. Prolonged Pain

Prolonged pain is the main symptom of CRPS. You may feel pain that lasts much longer than expected after an injury, and it can continue for months or even years. The pain often starts in one limb, such as your arm, hand, leg, or foot.

The pain can begin after a minor injury, surgery, or small sprain, yet it may feel much stronger than the original injury suggests. You may experience burning or stinging pain, throbbing or deep aching, sharp stabbing sensations, or constant pain that never fully goes away. The level of pain can change from day to day.

Simple touch, light pressure, or normal movement may make the pain worse, and even clothing brushing against your skin can trigger intense discomfort. Rest does not always bring relief, and long periods without movement can increase stiffness and pain, which can limit sleep and daily activities.

11. Muscle Wasting

Muscle wasting, also called muscle atrophy, can develop in the limb affected by CRPS. You may notice that your arm or leg looks thinner than the other side. This change often happens because pain limits how much you move the limb each day.

When you avoid movement due to severe pain, your muscles do not get enough use. Over time, unused muscles shrink and lose strength. You may see visible thinning of the limb, feel weakness when lifting or holding objects, have trouble standing or walking, or notice muscle cramps and tightness.

Joint stiffness, swelling, and ongoing pain can make movement harder, which leads to further weakness. In severe cases, shortened muscles can limit how far you can bend or straighten a joint. This loss of flexibility can affect daily tasks such as dressing or bathing.

12. Degraded Nerve Health

CRPS can damage your nerves over time. When nerves malfunction, they send mixed or constant pain signals to your brain, which can make your pain feel stronger and last longer than expected after an injury. The pain may not match the level of the original injury.

You may notice burning, stabbing, or stinging pain, along with tingling or numbness in the same area. Your nerves can become overly sensitive, so light touch, slight pressure, or small changes in temperature cause sharp pain. This is called hyperalgesia and allodynia, which means your nerves overreact.

Degraded nerve health can also change how your limb feels to you. You might feel as if the limb does not belong to your body or seems larger or smaller than it is. Movement may become harder, and tremors or spasms can appear, which adds to stiffness and discomfort.

13. Muscle Weakness

Muscle weakness often affects the limb with CRPS. You may notice that your arm or leg feels heavy and hard to lift. Simple tasks like holding a cup or walking across a room can become difficult, and the weakness may grow slowly as the condition continues.

Pain plays a major role in this problem. When you avoid moving the limb because it hurts, your muscles lose strength over time. Less movement leads to muscle loss, which makes the weakness worse, the limb may begin to look thinner than the other side.

You might also notice changes in muscle control. Your hand may struggle to grip objects, or your foot may drag when you walk, which can affect balance and raise the risk of falls. Stiff joints, swelling, muscle twitching, and tightness can add to the problem.

14. Severe Complications

CRPS can cause serious problems when pain and inflammation last a long time. These issues can affect your skin, muscles, bones, and daily function. You may develop skin breakdown in the painful area, and ongoing swelling with poor movement can lead to sores or ulcers that raise the risk of infection.

Muscle wasting and muscle tightening, called contractures, can also occur. When you avoid movement because of pain, muscles shrink and grow weak. In some cases, muscles shorten and lose their normal stretch, joints stay bent, and straightening them becomes hard or painful. Bone loss may develop and increase fracture risk.

Severe, ongoing pain can also affect your mental health. You may feel depressed, anxious, or hopeless during intense flare-ups, and sleep problems can make these feelings worse. In rare cases, CRPS spreads to another limb, which can further limit movement and independence.