Differential Diagnosis of Hand Rash

Dyshidrosis, Tinea Manuum, and Contact Dermatitis: How to Distinguish Blisters and Scaling on the Hands

Name: Dyshidrotic eczema, tinea manuum, and contact dermatitis: how to distinguish blisters and scaling on the hands
Published: 2026-08-23

Take close-up photos of the hands only, but record the difference between both hands, foot symptoms, and the date of exposure outside the photo.

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

Click on unfamiliar terms to see their meanings immediately.

Deep on the sides of the fingers small blisters, a wide area of one palm Keratin, and redness that follows the area of contact are different clues. Please also note the timing of water work, glove use, athlete's foot, or the use of new products or cosmetics.

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.

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.

Educational example of tinea manuum showing relatively wide fine keratinization and white keratin along the skin lines on one palm of an adult — **Prominent pattern of tinea manuum on one hand**
Tinea manuum can appear as fine scaling that is more severe on one hand, which can be confused with hand eczema. We consider accompanying athlete's foot and fungal tests together.

Actual photo of contact dermatitis showing redness and dryness on the back of the hand and fingers — **Contact Dermatitis**
Area of contact · redness and dryness · before and after using a new product. Differential diagnosis from hand eczema and infections.
Photo: Hannah Clover

Points to check	Dyshidrosis	Tinea manuum	Contact Dermatitis
Core Appearance	Deep, small blisters on the sides of fingers and palms	Fine scaling and white powder along skin lines	Redness, stinging, blisters, cracking
Distribution	Can occur on both hands; sides of fingers are a clue	One hand may be more severe	May overlap with the area of contact
Things to check together	Sweat, stress, season	Athlete's foot / fingernails and toenails	Detergents, gloves, metals, adhesives
Verification	Progress and examination	Fungal test if necessary	Removal of exposure / patch test if necessary

Check if deep, small blisters started on the sides of the fingers

Dyshidrosis is characterized by deep, small blisters on the sides of the fingers and inside the palms, and severe itching, rather than large blisters that burst immediately on the surface. itchingThis is a key clue. Take photos in chronological order, from the appearance of blisters to the stage where the skin peels after the blisters dry.

If keratinization occurs on both one hand and the feet, check for tinea

Tinea manuum can appear only as broad, fine keratinization on one palm, which can be confused with chronic hand eczema. If athlete's foot or changes in fingernails and toenails are present, confirming infection, including a fungal culture test, is the priority.

Educational close-up example of contact dermatitis showing a band-shaped redness and fine scales, as if a band touched the wrist — **Redness formed along the shape of contact on the wrist**
Even if the boundary is not perfectly straight, whether the rash overlaps with the area of contact, such as from a watch, band, or adhesive, serves as a clue. The date the product was changed is also verified.

The area of contact and the date you changed products are clues for contact dermatitis

Check if the rash boundaries overlap with areas of repeated contact, such as the inside of gloves, watches, bands, cleansers, or nail products. As time passes, the boundaries may blur, so photos from the onset and the work environment provide clearer clues.

Please take photos of both hands and feet together

Please take photos of the blisters on the sides of the fingers, keratinization on one hand, the skin between the toes, and changes in the toenails together. Also, please note the dates you started working with water, using gloves, or using new cosmetics.

Educational close-up example of eczema showing irregular red patches on the arm skin with micro-blisters and a slightly moist surface — **Micro-blisters and wet surfaces that may appear in acute eczema**
During the acute phase, not only redness but also small blisters, oozing, and peripheral scaling may be visible. If pus, heat, or pain overlap, we first check for infection.

Compare the starting location of small blisters, differences between both hands, athlete's foot, and exposure to water, gloves, or products all at once.

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Content to follow

If deep, small blisters appear on the hands and feet, is it dyshidrotic eczema?
How can I distinguish dyshidrotic eczema from athlete's foot or contact dermatitis?
Why is herbal medicine treatment important when blisters and cracking recur?

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 GuideWhen your skin changes after using new cosmetics, shampoo, or detergentsRather than attributing the cause to a single new cosmetic product, please record the affected areas, the date you started using it, whether the product was rinsed off or left on the skin, and any substances you come into contact with through your occupation or hobbies. Sensitive areas such as the eye area and face can also be affected indirectly through substances on your hands or in the air.

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

Skin terms used in this differential guide

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.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.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.Skin Fungal InfectionDermal fungal infections are commonly referred to as athlete's foot or tinea. A diagnosis is not made based on a round shape alone; the keratinization of the edges, the affected area, and fungal tests are checked together.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.

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

If the cycle of deep blisters on the hands and feet drying, peeling, and cracking repeats, managing only the affected area may leave a burden on your daily life. By dividing the changes into the vesicle stage and the dryness/fissure stage, the recurrence cycle can be managed, centered on Korean herbal medicine treatment.

Before the consultation

We ask where it appeared and when it worsened again

We examine the depth of the vesicles, feelings of heat, oozing, subsequent dryness and fissures, as well as sweat, stress, sleep, and the timing of recurrence.

During treatment

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

We compare the interval at which new vesicles appear, the degree of cracking and pain, limitations in the use of hands and feet, and the recovery period.

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.