Post Inflammatory Hyper Pigmentation is the discolouration of the skin, where the skin turns dark after any inflammation on the skin which could be due to an injury or because of disease like psoriasis, eczema, acne, etc. The main cause of PIH is increase in melanin (pigment that defines the colour in the skin) production which in turn triggers the healing of skin after inflammation or injury.
What are the causes of post inflammatory hyper pigmentation?The Post inflammatory hyper pigmentation can occur after trauma which can be physical or chemical and it can also occur after skin diseases like lichen planus (inflammatory skin disease), psoriasis, eczema, etc. And even after some procedures as a side effects like lasers, peels etc.
Is there any genetic predisposition for this condition?There is no such genetic predisposed directly but people who have darker skin colour can have more post inflammatory hyper pigmentation as compare with whiter skin colour.