Under-Eye Hyperpigmentation After a Procedure: Causes

Dark circles are one of the concerns that bring patients to the clinic. When, after a procedure, they get darker instead of better, the frustration is great, and the explanation is not always simple. There are at least three distinct causes, which look alike at first glance, and each calls for its own approach. Treating without diagnosing can make things worse.

This page organizes the reasoning for telling the causes apart and choosing a path, without prescribing injection technique. The context of dark circles is in dark circles: types and assessment and that of pigmentation after bruising is in residual pigmentation after ecchymosis.

What are the three main causes?

There are also underlying causes that can be mistaken for a complication: constitutional pigmented, vascular (purplish-looking), or structural (shadow-related) dark circles. See dark circles: types and assessment. In some patients, the dark circle was already mixed, and the procedure only revealed or worsened one component.

How do you tell them apart on exam?

A few simple tools help separate the causes:

1. History. Was there obvious bruising? How long after the procedure did the color appear or settle? Does the patient have melasma, a high phototype, atopy, or a history of post-inflammatory pigmentation?
2. Color. Bluish gray suggests Tyndall; brown suggests melanin or hemosiderin.
3. Light. Side or raking light highlights gel irregularities; diffuse light highlights pigment. Good lighting is part of the diagnosis; see lighting in the facial harmonization clinic.
4. Palpation. A nodule, cord, or irregularity under the skin suggests superficial gel.
5. Stretching the skin. Dermal pigmentation persists; structural shadow changes.
6. Dermoscopy or imaging, when available, to refine the diagnosis.

When the diagnosis is uncertain, the right move is not to act right away. Following up with photos over a period usually clarifies things, especially with hemosiderin, which tends to lighten.

What to do in each situation?

There is no single protocol, and the decision rests with the professional who examines the patient. The general directions:

Tyndall effect. Superficial gel is the cause. In general, the possibility of hyaluronidase enters the discussion, with careful assessment of the area, the amount, and the risks, because the region is sensitive and dissolving must be conservative. The topic is covered in dissolving filler: criteria for indication and Tyndall effect in the lips, and applies by analogy to the infraorbital region.

Hemosiderin. Hyaluronidase does not act on the pigment. Management is usually expectant, with strict sun protection and follow-up, because gradual lightening may occur. Additional interventions, such as topical lighteners or technologies, should be weighed against the risk of irritation and worsening in thin skin.

Post-inflammatory hyperpigmentation. It also tends to respond to sun protection and gradual dermatologic measures. In higher phototypes, caution with irritants and technologies is even greater. If needed, refer to a dermatologist with experience in the periorbital region.

How do you prevent infraorbital pigmentation?

Prevention is the best management, and it starts before the injection:

• Select the patient. Very thin skin, pigmented dark circles, and higher phototypes call for careful assessment and a frank conversation about limits.
• Choose the area and approach based on anatomy and skin thickness. See periorbital anatomy for injectables.
• Reduce the risk of ecchymosis: review medications and supplements, use good technique and good lighting. See anticoagulants and injectable procedures and supplements and bruising risk.
• Avoid superficial product in thin skin, to reduce the risk of Tyndall.
• Advise sun protection after the procedure, along with skin care.
• Document the baseline state of the pigmentation.

When should you refer to a dermatologist?

Not every infraorbital pigmentation needs a second look, but some situations justify referral:

• pigmentation that does not improve or gets worse after a period of follow-up and sun protection;
• suspected melasma component, contact dermatitis, or allergy to topical products;
• higher phototypes, where the risk of worsening with any technology is greater;
• diagnostic doubt among deep dermal, vascular, and structural pigmentation;
• need for technologies or formulas outside your practice.

The referral should include a summary: what was injected, when, what appeared afterward, the before photos, and the management adopted. This avoids repeated tests and protects the patient from duplicated interventions. Keep up joint follow-up, because the patient often comes back with questions about what to do with the filler, and the decision about hyaluronidase remains yours when the gel is involved.

While the condition evolves, advise on basic care: daily sunscreen, avoiding rubbing the area, not using strong acids or lighteners on their own, and not repeating procedures in the area without assessment. The patient's patience is part of the treatment, and a scheduled follow-up visit brings reassurance.

How to talk to the patient

The conversation matters. A patient who expected to improve and got worse feels deceived, and empathy comes before the technical explanation.

Avoid promises of quick lightening. Explain that some pigmentation lightens slowly, and that photo follow-up allows a decision without rushing. For communicating a disappointing result, see communicating a below-expectation result.

What to document

Record the history, the exam, the hypothesis, the photos, and the management. Note the instructions given and the follow-ups agreed. This record is essential for tracking progress and for your own protection, as in recording the complication in the patient record. When the condition progresses to pain, persistent swelling, or another suspicion, review chronic eyelid swelling after filler and infraorbital vascular occlusion.

And in Harmy?

Summary

Infraorbital pigmentation after a procedure has different causes that are easily confused. Diagnose using history, color, light, and before photos, avoid aggressive interventions, protect from the sun, use hyaluronidase only when the cause is the gel, and follow up with patience. Preventing through selection and technique always costs less than correcting.