Changes in Hands, Feet, and Nails

Distinguishing Psoriasis, Dyshidrosis, and Athlete's Foot When Hands and Feet Crack and Nails Change

Name: When hands and feet crack and nails change: distinguishing psoriasis, dyshidrotic eczema, and athlete's foot
Published: 2026-08-23

Take full shots of both hands and both feet, and close-up shots of blisters or cracking Take a close-up shot, and photograph 4 or more fingernails and toenails under the same lighting.

Last modified August 23, 2026Doctor of Korean Medicine Yeon-seung Choi

Click on unfamiliar terms to see their meanings immediately.

Psoriasis of the palms and soles is characterized by thick plaques with distinct borders and deep cracks, while nail psoriasis is indicated by pitted nails, oil-drop discoloration, and nail lifting. Small, deep blisters are characteristic of pompholyx, and fine Keratinscaling that is more dominant on one side may suggest a fungal infection such as athlete's foot.

Points to check in the photos first

Even if they look similar, the dead skin, blisters, and borders may differ

We have provided both typical appearances and examples that look slightly different. Do not decide based on a single similar photo; compare how long symptoms like dead skin, wheals, comedones, or oozing have persisted in the same area.

Educational close-up example of palmoplantar psoriasis showing well-defined thick keratin plates and several shallow cracks on the palm — **Thick keratin plates and cracks in pressure areas of the palms**
Palmoplantar psoriasis significantly interferes with walking, gripping, and working with water, even if the affected area is small. We compare bilateral distribution, fungal tests, and nail clues with hand eczema and tinea manuum.

Educational close-up example of nail psoriasis showing small pits, yellowish-brown oil-drop discoloration, and lifting and crumbling of the nail tips across several nails — **Small pits, oil-drop discoloration, and lifting of the nail tips**
Pitting, oil-drop discoloration, and lifting are clues for nail psoriasis, but fungal infections and trauma can appear similar. Joint pain and swelling are also checked.

Actual photo of dyshidrotic eczema showing small blisters on the palms and sides of the fingers — **Dyshidrosis**
Palms, sides of fingers, small and deep blisters, itching. Differentiate from athlete's foot and contact dermatitis
Photo: Inwe~commonswiki

Educational close-up example of pompholyx showing deep, small blisters and shallow peeling on the sides of the fingers and palms — **Deep, small blisters on the sides of the fingers**
Small, deep blisters on the sides of the fingers or palms are important clues for pompholyx. Since it can overlap with athlete's foot or contact dermatitis, we examine whether it is severe on only one side and consider exposure factors.

Points to check	Palm, Sole, and Nail Psoriasis	Dyshidrosis	Hand and Foot Fungus (Athlete's Foot)
Skin	Symmetrical thick scaly plaques with distinct borders, cracks in pressure areas	Small, deep blisters followed by peeling on the sides of fingers, palms, or soles	Fine scaling on one hand or sole, maceration between toes
Fingernails and toenails	Pitting, oil-drop discoloration, lifting, and crumbling	Possible changes around the nails following repeated inflammation	Thickening, discoloration, and crumbling; fungal confirmation required
Areas to examine together	Scalp, elbows, knees, joints	Sweat, nickel, season, stress	Athlete's foot and one hand, family or shared environments
Verification	Examination, differentiation from nail fungal infection	Check lesion stage and exposure	Consider skin and nail fungal tests

Compare the appearance of multiple nails rather than just one

Psoriatic pitting and oil-drop discoloration can overlap with fungal thickening, and both conditions may coexist. We examine the onset time for each nail along with any areas of skin psoriasis.

Ask whether blisters or thick plaques appeared first

Dyshidrosis is characterized by cycles of small, deep blisters and peeling, whereas palmoplantar psoriasis often centers on thick plaques with distinct borders and recurrent cracking.

Educational example of tinea corporis on an adult's torso, showing a ring-shaped rash with a relatively pale center and red, scaly edges — **Tinea corporis with distinct peripheral scaling**
Tinea corporis is characterized by a ring-shaped pattern where redness and scaling are more active on the outer edge than in the center. We confirm the need for infection treatment after differentiating it from nummular eczema or pityriasis rosea.

Check for pain and joint mobility

Pain from cracking when walking, limitations in hand use, morning finger stiffness, and joint swelling may increase treatment priority more than the surface area shown in photos.

Please take photos of both hands, both feet, and multiple nails

Please note whether blisters or cracking occurred first, and if you have athlete's foot, scalp scaling, or joint pain. For nails, do not just zoom in on one; take photos where multiple nails are visible together.

A medical illustration comparing normal epidermis with psoriatic skin showing immune activation, epidermal thickening, rapid skin cell migration, and surface scale accumulation — **Immune activation and accelerated epidermal cell proliferation**
This is a simplified concept showing how overactivation of the immune system contributes to the rapid increase of skin cells, inflammation, and the accumulation of scales.

Please note if both sides are similar, whether blisters or cracking came first, and any changes in multiple nails, athlete's foot, the scalp, or joints.

Next reading

Content to follow

Can cracking of the palms and soles or pitting of the nails be psoriasis?
How is psoriasis distinguished from pompholyx or athlete's foot in terms of tests and appearance?
What is the goal of Korean herbal medicine treatment for psoriasis that interferes with hand and foot function?

Medical Evaluation GuideDistinguishing between rashes that disappear within hours and dermatitis that lasts for daysFirst, observe whether swelling in the same area generally fades without leaving a mark within a day, or whether it stays for several days, leaving dead skin, oozing, or scabs. Wheals that disappear and reappear in different locations suggest urticaria (hives), while long-lasting surface changes suggest other types of dermatitis; however, a diagnosis requires looking at the overall progression.Medical Evaluation GuidePrepare for your visit with skin photos, symptoms, and medications usedRather than a single photo, please prepare a chronological record of the date the symptoms first appeared, the timing of when they disappear and reappear, itching and pain, and the medications used and your reactions to them. It is helpful for the medical evaluation to take photos of the same area from the same distance during both normal states and when symptoms are most severe.

You can check the simple meaning first before proceeding to the detailed explanation

Skin terms used in this differential guide

FissureFissures are a state where the skin is cracked, creating gaps, which can cause pain and bleeding on the hands, feet, or in skin folds.Fungal TestA fungal test is an examination that confirms a fungal infection by scraping off dead skin to view under a microscope or by culturing it if necessary.Plaque-like lesionIn dermatology, a plaque lesion refers to a lesion that is broadly raised with visible borders. Psoriatic plaques, where scales accumulate on a red base, are representative, but this shape itself does not automatically mean it is psoriasis.VesicleVesicles refer to small blisters. Since causes vary, including dyshidrosis that forms deeply on the sides of fingers, contact dermatitis, or infections, we examine the location, pain, itching, and whether they appear in clusters.Damp-HeatIn skin care, Damp-Heat is used to describe a pattern characterized by significant oozing, redness, and prominent feelings of heat and itching. It does not refer to a specific bacterium or test value.

When herbal medicine treatment is the primary focus

We set the goals for herbal medicine treatment based on your previous treatments and when symptoms recurred

Psoriasis can follow a chronic course where skin changes improve and then worsen again, and the burden varies by area, such as the scalp, nails, or skin folds. While continuing existing treatments, herbal medicine treatment can become the primary focus to manage the recurring patterns and overall systemic condition together.

Before the consultation

We ask where it appeared and when it worsened again

We examine the redness and thickness of the scales, the distribution of skin changes, sensations of heat or dryness, and symptoms related to sleep, digestion, fatigue, and joints.

During treatment

We check if not only the itching, but also sleep and daily life are improving

We compare the occurrence of new skin changes, scaling and cracking, nail changes, joint discomfort, and daily functional abilities.

Treatment sequence

We set the goals for herbal medicine treatment by identifying the problems that need to be resolved first

If there are causes that require immediate priority, such as infection or rapid worsening, those treatments come first. Subsequently, for herbal medicine treatment, we determine the primary goal of recovery by examining current discomfort, recurring patterns, sleep, digestion, and fatigue, and coordinate the sequence with necessary dermatological treatments.

While reducing aggravating factors through lifestyle management, herbal medicine treatment determines the initial target by analyzing the pattern of lesions, sleep, digestion, and fatigue through pattern identification (Byeonjeung). Necessary skin treatments are continued in accordance with the progress.

Consult about treatment

Evidence and Update Information

This content was organized by Korean medicine doctor Choi Yeon-seung and updated on 2026-08-23.

DermNet, Nail psoriasis
DermNet, Psoriasis of the palms and soles
American Academy of Dermatology, Psoriasis: Signs and symptomsPlaque, guttate, pustular, and erythrodermic psoriasis, and nail/joint symptoms