sun exposure – MySymptom

Can prolonged sun exposure cause dark brown spots on the face?

1. Introduction Prolonged sun exposure unequivocally causes the development of dark brown spots on the face, a condition clinically recognized as solar lentigines or ultraviolet-induced hyperpigmentation. When the unprotected epidermis is subjected to intense or cumulative ultraviolet radiation, the specialized pigment-producing cells in the skin, known as melanocytes, enter a state of defensive hyperactivity. These … Read more

Why do my old white surgical scars turn dark brown after being in the hot summer sun?

1. Introduction Old white surgical scars turn dark brown in the summer sun because the disorganized connective tissue of a scar is structurally distinct from normal skin and reacts unpredictably to ultraviolet radiation. The melanocytes surrounding and within the scar tissue can become hyper-reactive to sunlight, aggressively overproducing melanin in a misguided attempt to protect … Read more

Why do my body tattoos get raised and intensely itchy when I am out in the sun?

1. Introduction Body tattoos get raised and intensely itchy when out in the sun due to a localized photosensitivity reaction, frequently triggered by ultraviolet radiation interacting directly with specific ink pigments. The sunlight penetrates the dermis and alters the chemical structure of the tattoo ink, prompting the immune system to suddenly recognize these newly formed … Read more