Amyotrophic lateral sclerosis (ALS), commonly known as Lou Gehrig’s disease, is a progressive neurological condition that affects the nerve cells responsible for controlling voluntary muscles. It is a disease that can gradually change nearly every part of a person’s daily routine, from walking and speaking to eating, breathing, and completing once-simple tasks.
But ALS affects more than physical movement. It can also change relationships, emotional well-being, independence, body image, and the ways people experience affection and sexual intimacy.
For individuals living with ALS and the people who love them, these changes can bring grief, frustration, uncertainty, and difficult conversations. Concerns about sexual function and intimacy may feel especially uncomfortable to discuss, yet they remain important parts of quality of life.
Understanding ALS means looking beyond the diagnosis and recognizing the whole person: their physical needs, emotional experiences, relationships, personal goals, and desire to continue living as fully as possible.
What is ALS?
ALS is a disease that damages and destroys motor neurons, which are nerve cells in the brain and spinal cord that send signals to muscles. As these nerve cells stop functioning, the muscles they control become weaker and may gradually shrink, a process called muscle atrophy.
Over time, the brain loses its ability to control voluntary movements. ALS can affect the muscles used for walking, lifting, speaking, swallowing, and breathing.
The disease progresses differently for each person. Some people first notice weakness in a hand, foot, or leg, while others initially have trouble speaking or swallowing. The speed and pattern of progression can vary considerably.
Most cases occur without a known family history. A smaller proportion is inherited and associated with genetic changes. Although researchers continue to investigate the causes and develop new treatments, there is currently no cure that reverses the disease.
Importantly, ALS primarily affects motor function. Many people retain their senses, including sight, hearing, smell, taste, and touch. Many also retain their ability to think clearly and understand what is happening to their bodies. However, some people experience changes in thinking, behavior, language, or decision-making, and a subset develop frontotemporal dementia.
Symptoms of ALS and how the disease affects the body
ALS does not look the same in every person. Symptoms often begin subtly and become more noticeable as additional muscle groups are affected.
1. Muscle weakness and loss of mobility
Muscle weakness is one of the most recognizable symptoms of ALS. Early changes might include difficulty opening jars, turning keys, fastening buttons, climbing stairs, lifting objects, or walking without tripping.
As the condition progresses, a person may have increased difficulty standing, transferring between a bed and wheelchair, dressing, bathing, or repositioning themselves.
Muscles may also twitch involuntarily, cramp, or become unusually stiff. Muscle stiffness, known as spasticity, can cause discomfort and make movement more difficult.
These changes can be emotionally challenging because tasks that once required little thought may begin to require planning, assistance, adaptive equipment, or additional time.
2. Speech and communication difficulties
ALS can affect the muscles involved in speaking. A person’s speech may become slurred, quieter, slower, or harder to understand.
Some people develop changes in their ability to control their tongue, lips, or facial muscles. As communication becomes more difficult, conversations with family members, healthcare professionals, and friends may require additional patience and support.
Speech-language pathologists can recommend strategies, communication boards, text-to-speech devices, and other assistive technologies. Voice banking, which saves recordings of a person’s voice for possible future use with speech-generating technology, may also be worth considering early.
Communication support is about more than speaking. It helps preserve independence, relationships, and the ability to express preferences and make decisions.
3. Swallowing, eating, and nutrition
When ALS affects the muscles used for chewing and swallowing, eating may become tiring or unsafe. Some people cough or choke while eating, have difficulty swallowing liquids, or experience drooling because swallowing saliva becomes harder.
Maintaining adequate nutrition can also become challenging as meals take longer and the physical effort of eating increases. Unintended weight loss may occur.
A speech-language pathologist can assess swallowing safety, while a registered dietitian can help with nutrition, food consistency, calorie intake, and meal planning. In some circumstances, a feeding tube may be recommended to support nutrition, hydration, and medication administration.
4. Breathing difficulties
ALS can weaken the diaphragm and other muscles needed for breathing. Some people first notice breathlessness during activity, difficulty coughing, morning headaches, disrupted sleep, or shortness of breath when lying flat.
As respiratory muscles weaken, breathing support may become necessary. Non-invasive ventilation, commonly delivered through a mask, can help support breathing, particularly during sleep. Cough-assistance devices and secretion-management strategies may also help.
New or worsening breathing difficulty, choking, or an inability to clear secretions requires prompt medical attention. Severe breathing distress is an emergency.
5. Fatigue, discomfort, and sleep problems
ALS-related fatigue is not simply ordinary tiredness. Activities such as dressing, speaking, eating, or transferring between surfaces may require considerable energy.
Muscle cramps, stiffness, pain, difficulty changing positions, and breathing problems can also interfere with sleep. Poor sleep may then worsen daytime fatigue, concentration, mood, and physical endurance.
These symptoms can affect the ability to participate in family activities, maintain social connections, or enjoy time with a partner.
Managing energy and discomfort is therefore an important part of preserving quality of life.
6. Emotional and cognitive changes
Receiving an ALS diagnosis can bring shock, fear, sadness, anger, and uncertainty about the future. People may grieve changes in their independence, work, family roles, or plans.
Some experience depression or anxiety, while others struggle with the emotional burden of anticipating further physical changes. Certain individuals also develop involuntary episodes of crying or laughing, known as pseudobulbar affect, which do not necessarily reflect how they feel.
Although many people with ALS maintain their thinking abilities, cognitive and behavioral changes can occur. Assessment and support can help patients and families understand these changes and plan for communication and decision-making needs.
Psychological care is an important part of ALS treatment, not an indication that someone is coping poorly.
Common treatments for ALS
Although there is currently no cure for ALS, treatment can help slow disease progression in some people, manage symptoms, maintain independence, and improve quality of life. Care is most effective when it is coordinated among professionals with experience treating the condition.
Medications that may slow disease progression
Three medications are particularly important to discuss with an ALS specialist.
- Riluzole: A medication that may modestly extend survival by reducing processes thought to damage motor neurons.
- Edaravone: Available as an intravenous treatment or oral suspension. It may slow the decline of physical function in some patients, although the expected benefit varies and the evidence has limitations.
- Tofersen: A targeted treatment for adults with ALS caused by a confirmed mutation in the SOD1 gene. It is administered by injection into the spinal fluid and is not intended for people without that genetic cause.
These treatments have different eligibility requirements, potential benefits, risks, and practical considerations. An ALS specialist can help patients decide which options are appropriate. Clinical trials may also be worth discussing.
Treatments for symptoms and daily functioning
ALS care involves much more than medication.
Physical and occupational therapy
These professionals help preserve comfortable movement, reduce stiffness, support safe transfers, and recommend adaptive equipment for dressing, bathing, mobility, and other daily tasks.
Speech and communication support
Speech-language pathologists can help with speaking, swallowing, and communication devices that allow patients to express their needs as speech changes.
Respiratory care
Respiratory specialists can assess breathing, arrange noninvasive ventilation when needed, and recommend cough-assistance equipment and secretion-management strategies.
Nutrition and swallowing care
Dietitians and swallowing specialists help patients maintain nutrition and hydration, adapt food textures, and evaluate whether additional nutritional support is needed.
Additional medications may help with muscle cramps, spasticity, excessive saliva, pain, constipation, sleep problems, depression, or involuntary laughing and crying.
Palliative care can also be introduced at any stage to help manage symptoms, support decision-making, and improve quality of life. It can be provided alongside disease-directed treatment.
Additional Educational Resources
- The ALS Association: Understanding ALS and Therapies and Care.
- National Institute of Neurological Disorders and Stroke: ALS information and research.
- Centers for Disease Control and Prevention: ALS information and the National ALS Registry.
- ALS Association: Sex and Intimacy with ALS.
Citations.
(see Additional Educational Resources)
Empowering Intimacy
NIH
NIA
ALS Foundation