Psoriasis vs Eczema: How They Differ

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When eczema and psoriasis both cause red, angry skin, they actually look and feel very different. Eczema causes an intense itch on the body. It usually hides in the warm, sweaty bends of your body, like the inside of your elbows or directly behind your knees. The skin often looks thinner, weepy, or raw from constant scratching. Psoriasis, on the other hand, builds up into thick, raised patches covered in dry, silvery scales. Instead of extreme itching, psoriasis patches usually feel sore, tight, or like they are burning. It also prefers targeting the tough outer edges of your body, like your outer elbows, knees, and scalp.

Quick Comparison Table

Typical Appearance

When you look closely at eczema, it looks like your skin reacting ot something very frustrating. The skin often looks much thinner than normal; because you simply cannot stop scratching, it easily becomes raw. Sometimes, eczema patches even look a bit weepy or leak a tiny amount of clear fluid. It rarely builds up a thick crust unless a bacterial infection gets inside the scratches. 

Psoriasis, on the other hand, builds a heavy wall; it is an internal immune issue that forces your skin cells to grow fast too. Instead of the skin looking  thin, psoriasis builds up thick, raised red patches. On top of these swollen patches, you will almost see dry white or silvery scales. It looks like a rough dust crust sitting directly on top of the skin. If you try to pick off or peel that scale off, the skin underneath will instantly start to bleed.

Common Body Areas

Eczema and psoriasis occur on different parts of the body, though they can still occur in the same places as well.

Eczema

It usually occurs on skin creases and flexural areas, the bends where skin folds.

• Inner elbows and back of the knees.
• Neck, wrists, and ankles.
• Face and cheeks, especially in babies and young children.
• Hands and eyelids.

Psoriasis

It usually affects the outer surfaces of joints and areas which are prone to friction or scale buildup.

• Outer elbows and knees
• Scalp, hairline, and behind the ear.
• Lower back.
• Fingernails, toenails showing pitting or thickening.
• Armpits, groin, or underarms, though these patches are usually smooth rather than scaly.
• Palm of hands and soles of the feet.

Itch, Pain, And Scaling

Eczema causes a deep, maddening itch that makes you wake all night. In eczema, you often feel the itch before you even see the redness, and you scratch it so hard that you force a rash to form. Psoriasis is very different; while it can definitely itch, the main feeling is usually pain. People with psoriasis often describe their patches as feeling sore, tight, or like they are physically burning. And then there is he scaling. Eczema might flake just a bit when the skin dries out, but psoriasis produces heavy, thick scales that easily flake off onto your dark shirts or bedding 

Age And History Patterns

Eczema usually starts very early. A huge number of people get it when they are babies or toddlers. It is also heavily tied to your body's allergy system. If you have a history of asthma, high fever, or food allergies, your chance of dealing with eczema goes way up.

Psoriasis usually waits to show up until you are older. Most people get their first major flare-up in their late teens, twenties, or even well into their fifties. It is deeply tied to your internal immune system and genetics. If a parent of yours has psoriasis, you are much more likely to get it. It is easily triggered by high emotional stress after you get over a bad sickness like strep throat.

Can both occur?

Yes, a person can actually have both eczema and psoriasis at the same time. You might have eczema acting up on the sweaty folds of your arms while psoriasis is busy building thick scales on your knees. Because these problems require completely different treatments, having both at once can be very frustrating. If this happens, you absolutely need a clear, professional plan so you do not accidentally make your condition worse while trying to treat the other.

How Diagnosis Is Made

A doctor will do a physical examination to look for symptoms of psoriasis or eczema. He will look for the pattern, color, and location of the rash and also check your nails. If the visual pattern is not clear, then he will do a skin biopsy by taking a sample of the skin and examining it under the microscope to confirm the diagnosis. He will also ask you questions related to your medical history or family history.

In Ayurveda, the practitioner will check your pulse, Nadi Pariksha, to check which of the internal energies are out of balance. He will also ask questions related to your digestion and lifestyle to know what exactly is triggering eczema or psoriasis in you. He will also do a physical and medical assessment to check the symptoms.

Why treatment differs

When To Seek Care?

You should seek medical care if you have the following signs:

• Your symptoms don't get better even with proper care.
• The itching, pain, or burning keeps you awake all night.
• The condition affects your face, eyelids, hands, feet, or scalp.
• The rash covers a large portion of your body or keeps recurring frequently.
• Your joints start having stiffness or pain suddenly.
• You notice pitting, thickening, or rumbling of your nails.

These signs are serious, and ignoring them can lead to infection or other serious conditions.

References

Psoriasis and Treatment: Past, Present and Future Aspects - PMC 

Skin Pain in Patients with Atopic Dermatitis or Psoriasis: A Web-based Survey - PMC 

Factors Associated with Exacerbation in Psoriasis Compared to Eczema - PMC