Bleeding and bruising - DermNet A bruise, also known as ecchymosis or a contusion, occurs when small blood vessels (capillaries) under the skin bleed, while the overlying skin remains intact The injury causes blood to leak and collect near the skin surface, causing bluish-black skin discolouration
Senile purpura - DermNet What is senile purpura? Senile purpura is a common, benign condition characterised by the recurrent formation of purple ecchymoses (bruises) on the extensor surfaces of forearms following minor trauma
Cellulitis: Symptoms, Causes, Treatment and more - DermNet Cellulitis is a common bacterial skin infection It can result in localised redness, pain, swelling, and systemic symptoms - see images below Without treatment, cellulitis can be life-threatening
Achenbach syndrome: Painful Blue Finger - DermNet Achenbach syndrome is a painful subcutaneous bruise resulting from damage to small veins in a finger, which causes it to swell and turn blue It can be treated by cooling and avoiding triggers
Warfarin-induced skin necrosis - DermNet What is warfarin-induced skin necrosis? Warfarin is an anticoagulant medicine (blood thinner) Warfarin-induced skin necrosis refers to a rare condition in which there is paradoxical blood clotting
Postinflammatory hyperpigmentation - DermNet What is postinflammatory hyperpigmentation? Postinflammatory pigmentation is temporary pigmentation that follows injury (eg, a thermal burn) or inflammatory disorder of the skin (eg, dermatitis, infection)
Subungual haemorrhage - DermNet What is the differential diagnosis for subungual haemorrhage? The differential diagnoses to consider for nail pigmentation include:
Cutaneous small vessel vasculitis - DermNet Cutaneous small vessel vasculitis, Hypersensitivity vasculitis, Immune complex small vessel vasculitis, Hypersensitivity angiitis Authoritative facts from DermNet New Zealand