14 Symptoms of Sensory Processing Disorder

2. Tolerance or Insensitivity to Pain

You may notice that your child does not react to pain in a typical way. They might fall, bump into furniture, or scrape their knees and show little or no response. This reaction can seem unusual compared to other children. It may raise concerns about how their body senses and responds to discomfort.

Hyposensitivity often causes insensitivity to pain. In this case, your child’s nervous system does not register signals such as pain or heat as strongly as expected. As a result, they may not pull away quickly from a hot surface or complain about cuts and bruises. Common signs include not crying after injuries, not noticing bleeding or swelling, seeking rough play like crashing into objects, and touching very hot or cold items without hesitation.

You might also see frequent bruises without a clear cause. Your child may take part in risky physical activities because danger signals from the body do not feel strong. Closer supervision during active play and regular body checks after sports can help support safety.

3. Sensitivity to Sudden or Loud Noises

Everyday sounds may feel overwhelming or even painful for some adults and children. A vacuum cleaner, hand dryer, barking dog, or school bell may seem much louder than they do to others. Sudden noises, like a balloon popping, can cause a child or adult to jump, cry, or quickly cover their ears.

This reaction is more than simply disliking noise. The brain and nervous system may treat normal sounds as if they are a threat. When this happens, the body can move into a stress response within seconds. A child may leave the room, avoid loud places, or become upset when noise levels rise.

These strong reactions can affect school, work, and social activities. A child might struggle during group work or avoid busy events, while adults may avoid crowded stores or gatherings. Even when hearing seems typical, sound can still feel too intense, leading to stress and tiredness.

4. Sensitivity or Intolerance to Some Textures

Some adults and children feel strong discomfort when touching certain materials, and everyday textures may seem unpleasant or even painful. The brain and nervous system may respond quickly, making it hard to ignore the feeling and continue daily activities.

Clothing can be a common trigger, and a child or adult may avoid wool, denim, or shirts with tags because they feel scratchy or tight. Seams, socks, or waistbands can become distracting. Food textures such as slimy, lumpy, or gritty foods may also cause stress and lead to gagging or refusal, even when the flavor is fine.

Personal care tasks like hair brushing, nail trimming, or face washing can feel uncomfortable. Some children and adults pull away from light touch but prefer firm pressure. Sticky materials like glue, sand, mud, or lotion may also cause avoidance. The sense of touch works differently, and safe textures can feel intense or overwhelming.

5. Obsessive Behavior

Some adults and children may seem stuck on certain thoughts or actions. They might repeat the same routine, ask the same question, or focus on one topic for a long time. These behaviors can feel hard to stop, even when they want to move on to something else.

Strong sensory input can trigger this pattern. If a sound, texture, or light feels uncomfortable, a child or adult may try to fix it again and again. They might adjust clothing, line up objects, or repeat actions until things feel “just right.” Changes in routine can cause stress or frustration.

These behaviors may include strict preferences for certain foods, fabrics, or schedules. The brain and nervous system may seek comfort and predictability when sensory input feels overwhelming. Repeating actions can be a way the body tries to reduce discomfort from sights, sounds, touch, taste, or movement.

6. Sensitivity to Touch and Contact

Some adults and children react strongly to touch that others see as normal. A light tap on the shoulder may feel sharp, uncomfortable, or even painful. The brain and nervous system can treat mild contact as a threat. This response may happen quickly and feel hard to control.

Clothing can also cause discomfort. A child or adult may be bothered by tags, seams, tight waistbands, or certain fabrics that create itching or burning feelings on the skin. Grooming tasks like hair brushing, nail trimming, or tooth brushing may feel too intense.

Crowded spaces may be overwhelming because of unexpected bumps or close contact, triggering anxiety. Some children and adults avoid hugs or handshakes but prefer firm pressure instead. A tight blanket or strong squeeze may feel calming, while the sense of touch sends stronger signals to the brain, making gentle contact feel intense.

7. Fidgeting Behavior

You may notice that you or your child cannot sit still for long. Constant tapping, squirming, rocking, or shifting in a chair can signal sensory processing challenges. This behavior often appears during quiet tasks such as homework, reading time, or meals at the table.

Fidgeting can help manage sensory input. When your body feels under-stimulated, you may move more to stay alert. When you feel overwhelmed, small repeated movements can help you calm down. Signs can include frequent hand or foot tapping, rocking back and forth, playing with clothing or small objects, trouble staying seated in class, and needing to move during calm activities.

Fidgeting may increase in noisy or bright places. Busy classrooms, crowded stores, or long meetings can make it harder to remain still. Fidgeting does not always point to a behavior problem, and it often reflects how your nervous system responds to touch, sound, or movement.

8. Sensitivity or Intolerance to Crowds

Some adults and children feel intense stress when entering crowded places. Busy stores, school hallways, concerts, or public events can feel overwhelming within minutes. The brain must process noise, movement, bright lights, and touch all at once, which can overload the nervous system.

Crowds bring many types of sensory input. There may be loud voices, sudden sounds, bright or flashing lights, strong smells, and people brushing against the skin. When the brain has trouble filtering these signals, a child or adult may feel trapped, upset, or eager to leave quickly.

Physical signs can also appear, as the heart may beat faster, and a person may sweat, feel dizzy, or struggle to think clearly. Children might cry, freeze, or hold onto a parent. Teens and adults may avoid events or stand near exits as the body shifts into a stress response.

9. Risk-Taking Behavior

You may notice that your child takes risks that seem unsafe or extreme for their age. This behavior often links to hyposensitivity, which means your child does not feel sensory input as strongly as others. Because of a reduction in sensory perception, they may look for stronger movement or physical experiences.

Your child may crave strong movement or deep pressure. They might climb high furniture, jump from tall places, or run into the street without fear. Common signs include jumping from unsafe heights, spinning or crashing into objects, touching hot or sharp items without caution, rough play with peers, and ignoring injuries or not reacting to pain.

You may also notice limited awareness of danger. Your child may not clearly sense pain, heat, or body position in space. This reduced response can lead to frequent bumps or accidents. Risk-taking can look impulsive and may overlap with attention-related conditions. When tied to sensory processing differences, the behavior often centers on seeking strong physical input to feel alert, calm, or focused.

10. Issues with Motor Skills

Some adults and children notice challenges with coordination and balance. The brain and nervous system help the body respond to touch, movement, and position. When this system does not process signals smoothly, simple movements may feel harder, and a person may feel unsure about where their body is in space.

Motor skills depend on how well the brain understands input from muscles, joints, and the inner ear, which supports balance. When signals are mixed or delayed, movements can seem awkward. A child or adult might trip, bump into objects, or struggle with tasks like buttoning a shirt or writing neatly.

Gross motor skills can also feel delayed and unsteady. Running, jumping, climbing, or catching a ball may take extra effort. Some children and adults avoid sports or busy playgrounds. A person may know what they want to do, but their body may not carry out the action smoothly, leading to frustration.

11. Aggressive Behavior

Some adults and children may show sudden aggressive behavior when their sensory system feels overloaded. Loud sounds, bright lights, or unexpected touch can push the brain past its limit. The body may react before there is time to think, and the response can feel fast and hard to control.

Aggression may include hitting, kicking, yelling, throwing objects, or using harsh words. These actions often happen during or right after strong sensory input. The nervous system may shift into a fight response when it struggles to sort sounds, sights, or touch.

This pattern is often seen in children who seem calm and then quickly lose control. A small trigger, like a clothing tag or crowded room, may feel overwhelming. Common triggers include loud noises, bright lights, strong textures, busy spaces, and unexpected physical contact.

12. Distraction

You may notice that you or your child gets distracted very easily. Small sounds, lights, or movements can pull your attention away from what you are doing. Your brain may react quickly to changes in the environment, even when others seem able to ignore them.

In a classroom or work setting, tapping pencils, whispering, buzzing lights, or traffic noise can feel impossible to tune out. Your brain may treat these background sounds as just as important as your task. Touch can also become distracting, as clothing tags, tight sleeves, or the feel of a chair may stay at the front of the mind.

Lack of concentration can affect daily tasks. You may start chores and leave them unfinished when something else grabs your focus. Multi-step directions may feel harder to follow when your senses feel overloaded. You might fidget, shift in your seat, or react to sudden noises as your nervous system works hard to sort sensory input.

13. Slow With Learning Language Skills

You may notice that your child is slow to learn new words or form clear sentences. They might struggle to follow simple directions or answer basic questions, and these delays can appear before age four. You may wonder why communication does not seem to develop as smoothly as expected.

Sensory processing problems can affect how your child hears and understands speech. If sound feels overwhelming, a child may tune out nearby voices, making it harder to connect words with meaning. Oral sensory processing can also play a role, because the mouth and tongue must sense touch and movement clearly to help form words.

Common signs include a limited vocabulary for their age, trouble combining words into short sentences, difficulty understanding simple instructions, frustration when expressing needs, and avoiding group conversations. You may also notice uneven skills, as your child may understand more than they can say, or speak clearly but struggle to follow directions, especially in loud or busy places.

14. No Sense of Personal Space

You may notice that your child stands too close to others. They might press against people in line or sit shoulder to shoulder when there is plenty of space. Their brain may not clearly read signals about distance and body position, which can affect social comfort.

Your child may bump into others without meaning to. They might lean on friends, climb into your lap often, or touch arms and faces during conversation. The body relies on touch, balance, and muscle feedback to judge space. When these senses do not work well together, your child may not sense where their body ends and another person begins.

Signs can include standing inches away while talking, hugging or touching others without warning, crashing into people during play, and struggling to stay within their seat space. At school, this may lead to social tension. Some children show the opposite pattern and avoid closeness because touch feels too intense, especially during stress or fatigue.