PIE vs PIH
Post-inflammatory hyperpigmentation (PIH) and post-inflammatory erythema (PIE) are common skin conditions that can develop after an inflammatory skin injury, such as acne or eczema. Although changes in skin coloration characterize both skin conditions, they differ in several key ways.
This blog post will explore the differences between PIH and PIE, including their causes, symptoms, and treatments.
What is Post-Inflammatory Hyperpigmentation (PIH)?
Post-inflammatory hyperpigmentation (PIH) is a skin condition that occurs when there is an increase in melanin production in response to skin inflammation or injury. Melanin is the pigment that gives skin its colour, and when there is excess in a particular area, it can cause dark spots or patches to form on the skin.
PIH typically appears as flat, brown or black spots on the skin that can vary in size and shape. It can develop after various skin injuries, including acne, insect bites, cuts, and burns. PIH is more common in people with darker skin tones, and it can take months or even years for the discoloration to fade.
What is Post-Inflammatory Erythema (PIE)?
Post-inflammatory erythema (PIE) is a skin condition that occurs when there is an increase in blood flow to the skin in response to inflammation or injury. This increased blood flow can cause the skin to appear red or pink, and the redness can persist even after the initial injury has healed.
PIE typically appears as flat, pink or red patches on the skin that can vary in size and shape. It can develop after various skin injuries, including acne, sunburn, and laser treatments. PIE is more common in people with lighter skin tones, and it can take weeks or months for the redness to fade.
What are the Differences Between PIH and PIE?
While both PIH and PIE are a result of inflammation or injury to the skin, they differ in several key ways:
Colour: PIH appears as brown or black spots, while PIE appears as pink or red patches.
Timing: PIH can take months or years to fade, while PIE typically fades a little faster, although it is essential to keep in mind that everyone heals differently, and time for every individual will be different.
Skin type: PIH is more common in people with darker skin tones, while PIE is more common in people with lighter skin tones.
Effect of Sunlight on PIH and PIE:
Sun exposure can worsen PIH, as UV radiation can cause an increase in melanin production in the affected areas. This can lead to the dark spots or patches becoming more pronounced, and in some cases, new areas of hyperpigmentation may develop. Sun exposure can also worsen PIE, and cause further damage to the already sensitive and inflamed skin. This can lead to the redness becoming more pronounced and long-lasting. Therefore, it is essential to wear sunscreen with a high SPF and reapply it every two hours, especially outdoors.
How are PIH and PIE Treated?
The treatment for PIH and PIE depends on the severity of the condition and the individual's skin type. Generally, treatment for both conditions focuses on reducing inflammation and promoting skin healing. This can include topical treatments, such as corticosteroids, retinoids, skin-lightening agents for PIH, or laser or light therapy for PIE.
It's important to note that while both PIH and PIE can be treated, they may take time to resolve fully. In some cases, the discoloration may never entirely disappear. However, with the proper treatment and care, most people can significantly improve their skin's appearance.
In conclusion, while PIH and PIE may seem similar at first glance, they are two distinct skin conditions with different causes, symptoms, and treatments.
If you’re dealing with either of these skin conditions, schedule a consultation with a professional to further discuss your treatment options.
