Keith Siau on X: "This patient had B12 deficiency. Skin pigmentation is thought to occur in 20% - mechanism explained by @shaykh_hamed and reversible after treatment 👇 Adrenal insufficiency should totally be
![Skin Hyperpigmentation and Increased Angiogenesis Secondary to Vitamin B12 Deficiency in a Young Vegetarian Woman | HTML | Acta Dermato-Venereologica Skin Hyperpigmentation and Increased Angiogenesis Secondary to Vitamin B12 Deficiency in a Young Vegetarian Woman | HTML | Acta Dermato-Venereologica](https://www.medicaljournals.se/acta/content_files/files/web/2755-web-images/2755fig2_opt.jpeg)
Skin Hyperpigmentation and Increased Angiogenesis Secondary to Vitamin B12 Deficiency in a Young Vegetarian Woman | HTML | Acta Dermato-Venereologica
![Vitamin B12 deficiency: Cutaneous manifestations may occur causing hyperpigmentation | Express.co.uk Vitamin B12 deficiency: Cutaneous manifestations may occur causing hyperpigmentation | Express.co.uk](https://cdn.images.express.co.uk/img/dynamic/11/590x/secondary/Vitamin-B12-deficiency-Hyperpigmentation-is-a-symptom-3652630.webp?r=1631821981645)
Vitamin B12 deficiency: Cutaneous manifestations may occur causing hyperpigmentation | Express.co.uk
![Vitamin deficiency symptoms: Are white spots on nails a sign? Doctor says 'stop worrying' | Express.co.uk Vitamin deficiency symptoms: Are white spots on nails a sign? Doctor says 'stop worrying' | Express.co.uk](https://cdn.images.express.co.uk/img/dynamic/11/750x445/1579554.jpg)
Vitamin deficiency symptoms: Are white spots on nails a sign? Doctor says 'stop worrying' | Express.co.uk
![Vitamin B12 deficiency symptoms: 'Tingling' skin might be a warning sign to see your GP | Express.co.uk Vitamin B12 deficiency symptoms: 'Tingling' skin might be a warning sign to see your GP | Express.co.uk](https://cdn.images.express.co.uk/img/dynamic/11/750x445/1414164.jpg)
Vitamin B12 deficiency symptoms: 'Tingling' skin might be a warning sign to see your GP | Express.co.uk
![Figure 1 from Recreational Nitrous Oxide Abuse-Induced Vitamin B12 Deficiency in a Patient Presenting with Hyperpigmentation of the Skin | Semantic Scholar Figure 1 from Recreational Nitrous Oxide Abuse-Induced Vitamin B12 Deficiency in a Patient Presenting with Hyperpigmentation of the Skin | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/939e4ded133d46e594d650edcef4f2f60d057f64/5-Figure1-1.png)
Figure 1 from Recreational Nitrous Oxide Abuse-Induced Vitamin B12 Deficiency in a Patient Presenting with Hyperpigmentation of the Skin | Semantic Scholar
![Vitamin B12 deficiency secondary to cobalamin F deficiency simulating dyskeratosis congenita - JAAD Case Reports Vitamin B12 deficiency secondary to cobalamin F deficiency simulating dyskeratosis congenita - JAAD Case Reports](https://www.jaadcasereports.org/cms/asset/8662ae09-9174-415a-985c-00da2ca1d561/gr1.jpg)
Vitamin B12 deficiency secondary to cobalamin F deficiency simulating dyskeratosis congenita - JAAD Case Reports
![Reversible hyperpigmentation as the first manifestation of dietary vitamin B12 deficiency - Indian Journal of Dermatology, Venereology and Leprology Reversible hyperpigmentation as the first manifestation of dietary vitamin B12 deficiency - Indian Journal of Dermatology, Venereology and Leprology](https://ijdvl.com/content/126/2006/72/5/Images/ijdvl_2006_72_5_389_27766_1.jpg)