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Psoriasis

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Psoriasis: What it is, Benefits and Procedures | Skinpaths

Dermatologists who treat psoriasis (and variants)

What is psoriasis, why can it appear, how to recognize it, and what steps usually help to control it safely.

Before reading: En skinpaths We distinguish between opinion and evidence. To write this content, we prioritized indexed medical sources and recommendations from scientific societies. At the end, you will find the complete bibliography for your reference.
Important: This article is for informational purposes only and does not replace medical advice. If you have any questions, persistent symptoms, or your condition worsens, consult a healthcare professional.

Summary in 60 seconds

  • Psoriasis is a chronic inflammatory skin disease
  • It is not contagious
  • It usually produces thickened plaques or patches with scaling.
  • It frequently affects elbows, knees, scalp, and sometimes nails or skin folds.
  • It may be accompanied by itching, burning, cracking, or significant cosmetic discomfort.
  • Genetic factors, immune system factors, and environmental triggers all play a role.
  • Outbreaks can worsen with stress, skin injuries, infections, or some medications
  • There are effective treatments to control it, although there is no definitive cure.
  • If there is joint pain or stiffness, it is advisable to consult a doctor because some people develop psoriatic arthritis. 

What is psoriasis?

Psoriasis is a chronic disease in which the immune system is abnormally activated and accelerates the turnover of skin cells. Armstrong-2020. In Instead of renewing itself at the usual rate, the skin produces cells faster, which causes them to accumulate on the surface and form inflamed and scaly areas. Raharja-2021.

It is not transmitted by contact: you cannot "catch" it by touching another person, sharing objects, or living with someone who has it. NPF-2025.

Why does it appear? (common causes)

The exact cause is not fully known, but evidence points to a combination of genetic predisposition, abnormal activation of the immune system, and environmental factors. Armstrong-2020Some people have a biological basis that makes them more prone, and certain triggers can promote outbreaks or worsen existing lesions. Raharja-2021.

Among the most recognized triggers are stress, some infections, trauma or skin irritation, smoking, alcohol, and certain medications NIAMS-2023Not everyone shares the same triggers, so the pattern can vary greatly from case to case. Perry-2024.

What does it look like and what symptoms does it cause?

The most common way is plaque psoriasisIt usually appears as well-defined, thickened, reddish or darker areas depending on skin tone, with whitish or silvery scales on the surface NIAMS-2023It frequently appears on elbows, knees, torso, lower back, and scalp. Raharja-2021.

In addition to plaques, it can cause itching, burning, stinging, cracking, and even bleeding if the skin is broken or manipulated. Perry-2024In some people it also affects the nails, causing pitting, thickening, or partial separation of the nail. NPF-2025.

Not all psoriasis looks the same. There are variations such as guttata, the reverse or flexurehe, the pustular and erythrodermicwhich is rare but can be more serious NIAMS-2023.

What can you do today? (safe and concrete measures)

keep the skin well hydrated, especially after bathing, because dryness and cracks often worsen the discomfort. NIAMS-2023Use mild products and avoid harsh cleansers if you notice irritation. NICE-2012.

Try to identify your triggersStress, friction, recent infections, sudden changes in weather, or products that irritate your skin NIAMS-2023Recognizing that pattern can help reduce outbreaks. Perry-2024.

If you are already on a prescribed treatment, use it as instructed. In the case of psoriasis, the constancy It is usually more useful than applying "a lot" of product for a few days NICE-2012.

What NOT to do? (common mistakes)

  • Do not self-medicate with potent corticosteroids for a prolonged period, especially on the face, skin folds, or genitals NICE-2012Improper use may irritate, thin the skin, or complicate the control of the condition. NICE-2025.
  • Do not stop or change prescribed treatments without first discussing it with your doctor, especially if your psoriasis is extensive or has required more complex therapies. NIAMS-2023.
  • Don't confuse medical phototherapy with "sunbathing" on your own. Uncontrolled sun exposure can irritate or burn the skin and is not a substitute for a supervised treatment plan. NIAMS-2023.
  • Don't ignore joint pain, stiffness, or swelling. just because “psoriasis is a skin condition” NIAMS-2023In some people, there may also be joint involvement. Armstrong-2020.

When should I consult a specialist?

  • If the injuries are new, extensive, or progressing rapidly NIAMS-2023.
  • If there is significant pain, cracks, bleeding, or difficulty sleeping due to itching or burning NPF-2025.
  • If it appears on your face, genitals, hands, feet, nails, or scalp and is affecting your daily life NPF-2025.
  • If you notice pain, swelling, or joint stiffness, especially in your fingers, wrists, ankles, or back NIAMS-2023.
  • If you have a fever, general malaise, or widespread redness AAD-2025.
  • If it doesn't improve, or you're not sure it's really psoriasis and not another skin condition, seek medical advice. Johnson-2013.

What does a dermatologist usually do?

The first step is usually a clinical assessment: reviewing the lesions, their location, whether the scalp or nails are affected, if there is itching or burning, and whether there is a family history, previous outbreaks, recent stress, infections, or medications that may be contributing factors. NIAMS-2023.

In many cases, the diagnosis can be guided by appearance and medical history. Johnson-2013If the condition is atypical or resembles other diseases, the dermatologist may take a small biopsy to examine it under a microscope. NIAMS-2023.

The treatment is then adjusted according to the location, extent, and impact on daily life: from creams or lotions to phototherapy, tablets, or injectable medications in moderate or severe cases. NICE-2025; Menter-2019.

If, in addition to skin problems, there is joint pain or stiffness, it is worth ruling out psoriatic arthritis.
Armstrong-2020; NIAMS-2023.

 

FAQ

Is psoriasis contagious?

  • No. It is not transmitted by touching skin, sharing objects, or living with a person with psoriasis. NPF-2025.

Do you have a cure?

  • Today it is not considered a disease with a definitive cure, but there are effective treatments to control it and reduce outbreaks. NICE-2025; NIAMS-2023.

Is it the same as eczema?

  • No. They may look similar in some cases, but they are different diseases, and sometimes a dermatological evaluation is needed to differentiate them properly. AAD-2025; Johnson-2013.

Can it affect the scalp and nails?

  • Yes. The scalp and nails are common sites and can greatly affect quality of life. NPF-2025.

Can stress make it worse?

  • Yes, in many people stress acts as a trigger or promotes outbreaks, although it is not the only factor NIAMS-2023.

Should I be worried if my joints hurt?

  • Yes, it's advisable to consult a specialist. Some people with psoriasis develop psoriatic arthritis, and early detection is important. NIAMS-2023.

Bibliography and sources

Content reviewed by:
Dr. Rodolfo Suárez
Medical Pathologist and Dermatologist
Master's Degree in Advanced Cutaneous Pathology
05/03/2026
19/06/2026
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