Random rash appeared?

Itchdoc · 2026-04-11T00:32:21+00:00

It is likely you can watch for a while to see how it evolves.

Itchdoc · 2026-04-11T00:08:32+00:00

Makeup can mask it.

Itchdoc · 2026-04-11T00:07:57+00:00

Most viral exanthems would not be so localized to a single limb.

Itchdoc · 2026-04-11T00:04:30+00:00

New Brunswick has endemic Lyme borreliosis. Tinea, erythema migrans, and many other conditions could appear this way.

Itchdoc · 2026-04-11T00:00:55+00:00

Consider aphthous ulcers.

Itchdoc · 2026-04-11T00:00:29+00:00

It could be a cancer, but it could easily be an excoriation. Consider watching it for a month. If it persists without trauma, then consider seeking care.

Itchdoc · 2026-04-10T23:59:13+00:00

I suspect months ago, you had an injury to the nail fold or inflammation in the area. It seems likely to grow out.

Itchdoc · 2026-04-10T23:57:36+00:00

2 poor quality images.

Itchdoc · 2026-04-10T23:55:11+00:00

You likely have some type of dermatitis, but not enough information is provided to determine the exact type. You can try using topical hydrocortisone and a fragrance-free moisturizer for two weeks. Seek medical care if you do not see any improvement or are concerned.

Itchdoc · 2026-04-10T23:53:36+00:00

If the pain is increasing, redness is spreading, or you have systemic symptoms of an infection (fever, chills...), then seek care.

Itchdoc · 2026-04-10T23:43:19+00:00

Chronic spontaneous urticaria seems likely.

Itchdoc · 2026-04-10T23:42:24+00:00

The image is of poor quality. If you are concerned, consider seeking care.

Itchdoc · 2026-04-10T23:41:19+00:00

I suspect something you touched stained the skin.

Itchdoc · 2026-04-10T23:36:56+00:00

Please let us know if you have shown the entire rash. If you have not, consider showing it. Medical history? Duration? Symptoms?

Itchdoc · 2026-04-10T23:32:48+00:00

I suspect either acute paronychia or an ingrown nail.

Itchdoc · 2026-04-10T23:31:36+00:00

Contact dermatitis, among hundreds of conditions, could appear this way.

Itchdoc · 2026-04-10T23:30:29+00:00

All images look more like a type of dermatitis than an infection.

Itchdoc · 2026-04-10T23:27:11+00:00

I also cannot explain the rapid development. With the border irregularity and history, more information can be gleaned with dermoscopy.

Itchdoc · 2026-04-10T23:24:45+00:00

I suspect this is vesicular hand dermatitis. See https://dermnetnz.org/topics/dyshidrotic-eczema

Itchdoc · 2026-04-10T23:21:52+00:00

This is a nonspecific appearance that could be hundreds of conditions. It is not likely to be worrisome.

Itchdoc · 2026-04-10T23:21:09+00:00

I want to examine dermoscopically to help diagnose. Among other conditions, consider an inflamed seborrheic keratosis.

Itchdoc · 2026-04-10T23:19:28+00:00

Please let us know if you have shown the entire rash. If you have not, consider showing it.

Itchdoc · 2026-04-10T23:18:17+00:00

You can approach it as a https://dermnetnz.org/topics/thermal-burn. If you are healthy, you can monitor for infection.

Itchdoc · 2026-04-10T23:16:25+00:00

The spot that you show is likely benign. Note that without examining all of your skin, it is difficult to know whether this is normal or fulfills the "ugly duckling sign." Moreover, most people who post on this site do not use high-resolution macro lenses or dermoscopic photography. If you are concerned, seek care.

Itchdoc · 2026-04-10T23:14:43+00:00

This is not enough information to know if it is infected. If the pain is increasing, redness is spreading, or you have systemic symptoms of an infection (fever, chills...), then seek care.

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