A Sore on the Back of the Hand That Won't Heal

Does a non-healing sore on the hand need to be checked?

Yes. A sore on sun-exposed skin that has not fully closed after about four weeks is worth an in-person exam, and the back of the hand is exactly that kind of skin. A minor scrape or crack usually seals within two to three weeks. A spot that scabs, heals partway, then reopens in the same place is behaving differently from a healing wound — and that pattern, not any single day's look, is the reason to have it seen.

A recurring skin sore that heals and comes back is one of the outward changes dermatologists take most seriously, precisely because it is the presentation people most often wave off as slow healing. No article, photograph, or symptom checker can tell you what your particular spot is; only an in-person look, and sometimes a small sample of the skin, can. What this page can do is lay out the features that make a lesion worth an appointment, how to document it, and how quickly to go.

A sore on the hand that has not healed after about a month is a reason to be examined, whatever it turns out to be.

Why the backs of the hands collect skin cancers

The backs of the hands — along with the face, ears, scalp, forearms, and lips — take more lifetime ultraviolet light than almost any other skin. Ultraviolet radiation from the sun, sunlamps, and tanning beds is the main modifiable cause of skin cancer, and its damage accumulates over decades 1Ref 1National Cancer Institute (PDQ Screening and Prevention Editorial Board) (2025).Skin Cancer Prevention (PDQ®)–Health Professional Version.Ultraviolet radiation from the sun, sunlamps, and tanning beds is the main modifiable cause of skin cancer, and cumulative exposure on sun-exposed skin such as the backs of the hands raises risk.. Hands are easy to miss when applying sunscreen, so they quietly gather the exposure that drives non-healing spots later in life.

Think of where a hand spends its day: on the steering wheel, holding a garden tool, resting on an armrest by a sunny window. The same logic explains why skin cancer on the ear, the lip, and the rim of the nose is common — these are the parts that face the sky and rarely get covered. A stubborn sore on the back of the hand sits in that same high-exposure company, which is why it earns a closer look rather than a longer wait.

What a non-healing sore on the hand can turn out to be

It can be several things, and they can look alike to the naked eye. On the hands, common non-cancer causes include a stubborn wart, a patch of irritant contact dermatitis from repeated wet work or harsh cleansers, and eczema or a slow-healing knock or burn. Irritant contact dermatitis — the most common form of contact dermatitis — comes from direct damage to the skin barrier rather than an allergy, and it often tracks with a person's occupation and hand-washing 2Ref 2Patel K, Nixon R (2022).Irritant Contact Dermatitis — a Review.Irritant contact dermatitis is the most common form of contact dermatitis, caused by direct skin-barrier damage rather than an allergy, and it is often related to occupational wet-work and hand-washing..

The lesions that most need ruling out are the keratinocyte skin cancers, which favour exactly this sun-exposed skin. Because a benign patch and an early cancer can share the same scab-and-reopen behaviour, the two are told apart by examination and, when needed, a biopsy — not by matching your spot to a photograph online.

keratinocyte skin cancers — basal cell carcinoma and squamous cell carcinoma, the two most common skin cancers, both linked to cumulative sun exposure.

The features that make a hand spot worth an urgent look

Certain features raise the priority of being seen, though none is a diagnosis on its own. The things clinicians weigh include a sore open beyond a month, one that bleeds or crusts and reopens repeatedly, a spot that is growing or thickening, a firm or raised bump, a tender lesion, and a hard, horn-like growth. Any new, changing, or non-healing spot on the hand belongs in that group.

• Won't heal or keeps returning — open, scabbing, or reopening in the same place beyond three to four weeks.
• Bleeds easily — bleeds from minor contact, or keeps forming and shedding a thin crust.
• Growing or thickening — widening, rising, or becoming firmer over weeks to months.
• A tender skin lesion — sore or painful to touch rather than simply itchy.
• A cutaneous horn — a hard, keratin, horn-like projection, which dermatologists examine because of what can sit at its base.
• New or mixed pigment — a spot gaining colour or darkening while it changes.

No single item on this list confirms or rules out anything. Their value is as a threshold: the more of them a spot shows, or the longer it persists, the sooner it deserves an appointment.

How to photograph and track a spot while you wait

Documenting the spot turns a vague worry into something a clinician can act on. Photograph it in bright, even daylight from directly above, then again from a slight angle, and set a ruler or a coin beside it for scale. Keep the framing and lighting the same each time. Re-shoot every week or two, and note the date, whether it bled, and any change in size, colour, or thickness.

This record does two useful things. It shows whether you are looking at a spot that heals then comes back or one that is steadily enlarging — a difference that is hard to judge from memory. And it gives whoever examines you, in person or by image, a timeline instead of a single snapshot. Store-and-forward teledermatology depends on exactly these photographs, which is why the AAD sets image-quality standards for them 3Ref 3American Academy of Dermatology (2024).Teledermatology Standards.Store-and-forward teledermatology depends on submitted photographs and has AAD image-quality standards for evaluating skin lesions remotely..

How a dermatologist confirms and treats it

The evaluation is usually quick. A dermatologist examines the spot, often with a dermatoscope, and if it looks suspicious, takes a small sample of the skin. That biopsy is the only way to know for certain what a lesion is 4Ref 4Kim JYS, Kozlow JH, Mittal B, et al. (2018).Guidelines of care for the management of basal cell carcinoma.A skin biopsy is used to establish the diagnosis of basal cell carcinoma before treatment.. If it shows a skin cancer, most are removed in a single office procedure: low-risk tumours are treated with standard surgical excision using recommended clinical margins 5Ref 5Kim JYS, Kozlow JH, Mittal B, et al. (2018).Guidelines of care for the management of cutaneous squamous cell carcinoma.Low-risk cutaneous squamous cell carcinoma is treated with standard surgical excision using recommended clinical margins..

For cancers in functionally and cosmetically sensitive, high-risk locations — the hands, face, ears, lips, and nose among them — Mohs micrographic surgery, which checks the margins under the microscope during the operation, is often the appropriate choice 6Ref 6Ad Hoc Task Force (Connolly SM, Baker DR, Coldiron BM, et al.) (2012).AAD/ACMS/ASDSA/ASMS 2012 appropriate use criteria for Mohs micrographic surgery.Mohs micrographic surgery is rated appropriate for skin cancers in high-risk anatomic locations, including the hands and face.. Which approach fits depends on the tumour's type, size, and behaviour, and that is a conversation to have once the diagnosis is known — not a reason to delay the first appointment.

A biopsy — a small sample of the skin — is the only way to tell what a non-healing spot actually is.

How soon to be seen, and lower-cost ways in

A non-healing sore is not an emergency, but it should not drift for months either; a reasonable target is to be seen within a few weeks. Skin cancers on the hands tend to grow slowly, yet the earlier a keratinocyte cancer is treated, the smaller and simpler the removal usually is. If a dermatology appointment is far out, a primary-care clinician can examine it and refer, and a photograph-based teledermatology visit can help triage whether an in-person biopsy is needed.

Cost should not be the reason a spot goes unchecked. Free skin cancer screening events, including community skin cancer screening programs, run in many areas and can flag a lesion that needs follow-up. A photograph-based visit is often the fastest and least expensive first look. However you get in, the aim is the same: a trained eye on the spot, and a biopsy if that eye is unsure.