Darkening of Fingertips: Causes and Concerns

Fingers turning black?

Hello Doctor: My father's fingers (both thumbs and the left ring finger) have recently started to turn black from the area where the nail meets the skin, spreading from the inside out.
The affected area is not very large and has started to extend upward from one corner, specifically under the nail.
My father has high blood pressure, but it is well-controlled with medication.
I would like to ask why his fingers are like this?

Ms. Hsu, 20~29 year old female. Ask Date: 2011/10/03

Dr. Li Zhiyao reply Internal Medicine

Dear Ms.
Hsu,
Your father's finger issue may be due to subungual hematoma, microvascular problems, or other causes.
It is recommended that he return to the physician who originally treated his hypertension to inform them of this symptom.
After the original physician evaluates him, they can decide on further management.
If he visits another physician, it would be best to bring his current medications for the new doctor’s reference to facilitate treatment.
Wishing your father a speedy recovery!

Reply Date: 2011/10/03

More Info

The darkening of the fingertips, particularly at the junction of the nail and the skin, can be concerning and may indicate several underlying conditions. In your father's case, the localized darkening on the thumbs and the left ring finger could be attributed to a variety of factors, especially considering his medical history of hypertension.

One potential cause of darkening or discoloration of the fingertips is a condition known as cyanosis, which occurs when there is insufficient oxygen in the blood. This can lead to a bluish or purplish tint in the extremities, including the fingers. However, since you mentioned that the discoloration is black and localized, it may not be cyanosis but rather related to other factors.

Another possibility is peripheral vascular disease (PVD), which is common in individuals with hypertension and can lead to reduced blood flow to the extremities. This reduced blood flow can cause changes in skin color, temperature, and sensation. If the blood flow is significantly compromised, it can lead to tissue damage and necrosis, which may present as darkened skin.

Nail fungus or other infections can also cause discoloration under the nail. Fungal infections can lead to a darkening of the nail bed and surrounding skin. If there is any associated pain, swelling, or discharge, this could be a sign of an infection that requires medical attention.

In some cases, melanonychia, which is a condition characterized by the presence of brown or black pigmentation in the nail, can also occur. This can be benign or may indicate a more serious underlying condition, including melanoma, especially if the pigmentation is new, changing, or associated with other symptoms.

Given your father's history of hypertension, it is crucial to consider the possibility of vascular complications. Hypertension can lead to changes in blood vessels, which may affect circulation to the fingers. Additionally, if he is on certain medications for hypertension, some drugs can cause skin changes or discoloration as a side effect.

It is essential for your father to see a healthcare provider for a thorough evaluation. The doctor may perform a physical examination and possibly order tests such as blood tests, imaging studies, or a referral to a dermatologist or vascular specialist, depending on the findings. Early diagnosis and treatment are crucial, especially if there is a risk of vascular compromise or infection.

In summary, the darkening of your father's fingertips could be due to several factors, including vascular issues, infections, or other dermatological conditions. It is important to seek medical advice promptly to determine the underlying cause and appropriate treatment. Regular monitoring of his blood pressure and overall vascular health is also advisable, given his medical history.

Similar Q&A

Understanding Sudden Darkening of Skin Between Fingers: Causes and Advice

My mother's web space between her thumb and index finger has suddenly turned dark. It is not painful or itchy, and it doesn't seem to be a bruise. The left hand is more severely affected. Please advise, thank you.

Dr. Huang Ruiyun reply Dermatology
I'm sorry, but your symptoms cannot be diagnosed online. It is still recommended that you visit a dermatologist for consultation.

Understanding Darkened Finger Joints: Causes and Treatments

Hello Doctor: I apologize for interrupting you during your busy schedule. My main symptoms are that the joints of my fingers on both hands appear very dark. When my hands are cold, they turn purplish-black, and after exposure to hot water, they turn red, but they do not return to...

Dr. Wu Yuxin reply Dermatology
It may be knuckle pads, but the color of knuckle pads changes less due to temperature variations. It is advisable to seek medical attention for confirmation.

Understanding Blackened Nail Edges: Causes and Solutions

Why has the thumbnail changed color?

Dr. Wu Yuxin reply Dermatology
Medical regulations state that "physicians must personally examine patients before administering treatment or prescribing medication..." Therefore, online diagnosis is also not permissible. If you are experiencing significant distress, it is advisable to seek medical at...

Understanding Skin Symptoms: Is Keyboard Use Causing My Issues?

I recently noticed that the skin on the back of my hand, around the joints of my fingers and palm, appears to be hardened (like calluses) and has become dark and dull. Could this be caused by prolonged keyboard use? Additionally, I have a round lump (tumor?) under the skin on my ...

Dr. Huang Ruiyun reply Dermatology
Online diagnosis is not possible; if you are truly troubled, you should seek in-person medical attention.