Dermatology
The dermatologist is a doctor who specialises in conditions that affect your skin, hair, and nails. They are also experts at treating various types of wounds such as cuts or bug bites! The Dermatology specialists will treat anything from acne to eczema with the latest treatments available today. Join our Dermatology Space and find answers from verified Dermatologists!
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Dear @dylanojh Folliculitis is due to inflammation of hair follicles.  It can be due to bacteria, virus or even fungus. Folliculitis is not a sign of allergy but it indicates poor skin health.

You might wish to refer to my previous article on maskne on some tips of skin self care and treatments available for acne.

https://www.askdr.co/articles/acne-mechanica-causes-and-treatment-of-maskne

Hope this helps.
Dr. Yan Y T
@fiona sorry for your present condition. It can be an allergic reaction. Some foods or dust from your home or clothes or insect ocean cause this condition. If the condition is really too much itching and grows very rapidly then it would be Urticaria. In normal allergic condition you need antihistamine or anti allergic medicine.But in Urticaria you must need to take some Low dose steroid with antihistamine drugs.
I would like to suggest you to go nearest GP chamber and take medicine if this condition is intolerable.
Take care.Hope your quick recovery.
Dr. Mst S S S
Hi @hojichatealatte 
The recurrence of the lesion on ur middle finger seems disturbing. I would advice seeing a doctor to confirm the diagnosis as it sounds like it is a wart versus callus however it is best for a doctor to see the lesion and confirm the diagnosis.  
Dr. Jeanel G
Hi @xty, the accutane dose regime is tailored by your doctor specifically for you. In general, the duration of treatment and daily dose of your medication is approximated by a "total cumulative dose" that is approximately 120mg/kg with variations between individual patient and medical practitioners. If you missed your dose for 3 days, do NOT triple or double your dose on the next day. You may just need to extend the total duration of treatment by 3 additional days to achieve whatever total cumulative dose was set for you.
Dr. Bryan K