Scleroderma causes hardening and tightening of the skin, but symptoms vary widely depending on the type. Some people develop only a few patches of firm skin, while others experience progressive damage to internal organs including the lungs, kidneys, and digestive system. About three in four people diagnosed are women, with onset most common between ages 40 and 70.
Localized vs. Systemic: Two Different Diseases
Scleroderma falls into two broad categories, and the distinction matters because they behave very differently. Localized scleroderma affects only the skin and the tissue just beneath it. Systemic sclerosis, the more serious form, can damage blood vessels and internal organs throughout the body.
Localized scleroderma shows up in one of two patterns. Morphea produces oval patches that start as small red or purple spots, then develop firm white or ivory centers. Over time, the patches become dry, smooth, and tight. Linear scleroderma creates streaks of thickened or discolored skin that run along an arm, leg, or occasionally the forehead and scalp. Both forms make the affected skin less flexible, but they don’t typically spread to internal organs.
Raynaud’s Phenomenon: Often the First Sign
For many people with systemic scleroderma, Raynaud’s phenomenon is the earliest symptom, sometimes appearing years before anything else. It happens when small blood vessels in the fingers and toes clamp down in response to cold temperatures or stress, cutting off blood flow in a distinctive three-phase color change: white first as vessels constrict, then blue as oxygen drops, then red as blood rushes back in. During episodes, the affected fingers or toes may feel numb, tingly, or painful.
Raynaud’s is common in the general population and usually harmless on its own. But when it’s accompanied by other changes, like swelling in the fingers or tightening skin, it can signal the beginning of systemic sclerosis.
Skin Tightening and How It Progresses
The hallmark of scleroderma is skin that becomes thick, tight, and hard. In the diffuse form of systemic sclerosis, this thickening tends to spread quickly across the trunk, arms, and legs. Skin symptoms typically peak within three years, then stabilize or even improve. Rapid skin changes are a warning sign, as they often correlate with a greater risk of internal organ damage happening simultaneously.
In limited systemic sclerosis, skin thickening is restricted mainly to the fingers, hands, and face. It worsens very slowly over many years. The skin on the fingers can become so rigid that it causes contractures, making them permanently difficult to bend. This tightening of the finger skin is called sclerodactyly, and it’s one of the defining features of the limited form.
The Five Features of CREST Syndrome
Limited systemic sclerosis is sometimes called CREST syndrome, an acronym for its five characteristic symptoms:
- Calcinosis: Calcium deposits form under the skin as firm white or yellow bumps, commonly on joints, fingertips, and the face.
- Raynaud’s phenomenon: Painful spasms in small blood vessels cause color changes in the fingers and toes.
- Esophageal dysmotility: The muscles lining the esophagus weaken, causing chronic acid reflux and difficulty swallowing.
- Sclerodactyly: Scarring and tightening of the skin on the fingers restricts movement.
- Telangiectasias: Widened capillaries near the skin’s surface create small red or purple marks on the face and hands, resembling tiny spider veins.
Not everyone with limited scleroderma develops all five. Some people have only two or three of these features.
Digestive Symptoms
The gut is one of the most commonly affected organ systems in systemic scleroderma. The disease replaces the muscles and nerves in the walls of digestive organs with scar tissue, which stiffens those walls and disrupts the coordinated contractions that move food through your system.
In the esophagus, this means food can feel stuck in your chest after swallowing, because the normal wave-like contractions that push food downward stop working. A weakened valve at the bottom of the esophagus also lets stomach acid flow backward, causing persistent heartburn and regurgitation. The impaired esophagus can’t clear that acid back down, making reflux worse.
When the stomach is involved, it empties food very slowly. You may feel full after just a few bites, or experience nausea, vomiting, and abdominal pain. In the small intestine, stalled contents allow bacteria to overgrow, producing bloating, gas, and diarrhea. The colon can swing between diarrhea and constipation. In some cases, weakening of the anal sphincter leads to fecal incontinence.
Lung Involvement
The lungs are a major concern in systemic scleroderma. Two problems can develop. The first is scarring of the lung tissue itself, called interstitial lung disease, which makes it progressively harder to get enough oxygen. You might notice shortness of breath during activities that used to feel easy, or develop a persistent dry cough.
The second is high blood pressure in the arteries that supply the lungs. This forces the right side of the heart to work harder, eventually leading to fatigue, chest pain, and worsening shortness of breath, even at rest. Lung complications are the leading cause of serious outcomes in scleroderma, so new or worsening breathing symptoms deserve prompt attention.
Kidney Crisis
About 10% of people with diffuse systemic sclerosis develop a scleroderma renal crisis, a sudden and dangerous spike in blood pressure paired with rapidly declining kidney function. It often strikes without any prior kidney problems. Symptoms can include severe headaches, blurred vision, confusion, and swelling. Some people also develop heart failure or breakdown of red blood cells.
What makes this tricky is that roughly 10% of renal crisis cases occur without obviously high blood pressure. Blood pressure may still be elevated relative to that person’s normal baseline, but it can look “normal” on a reading. This is why people with diffuse scleroderma are often encouraged to monitor their blood pressure regularly at home so they can catch a sudden rise early.
Other Common Symptoms
Fatigue is one of the most pervasive symptoms of scleroderma, reported across nearly all forms. It’s not ordinary tiredness. Many people describe it as a deep, unrelenting exhaustion that doesn’t improve with rest.
Joint pain and stiffness are also common, particularly in the hands and wrists. Muscle weakness can develop as scar tissue replaces healthy tissue. Some people notice puffiness in their fingers and hands, especially early in the disease, before the skin begins to tighten and harden.
How Symptoms Differ by Type
The pattern of your symptoms often points to which form of scleroderma you have. Localized disease stays in the skin. Limited systemic sclerosis progresses slowly over years and primarily affects the skin on the fingers and face, the esophagus, and the blood vessels in the hands, though lung involvement can still develop over time. Diffuse systemic sclerosis moves faster, with widespread skin tightening that can peak within three years and a higher risk of kidney, lung, and heart complications early in the disease course.
Because scleroderma symptoms overlap with many other conditions, and because the disease itself ranges from mild skin patches to life-threatening organ involvement, getting an accurate diagnosis often requires a rheumatologist familiar with the condition. Blood tests for specific antibodies, combined with the pattern of symptoms, help distinguish which type is present and guide what to monitor going forward.