associations
Last reviewed 03/2021
These include:
- drugs:
- barbiturates
- sulphonamides
- aspirin
- infections:
- herpes simplex - virus 1 and 2 – most commonly identified aetiology
- typhoid
- mycoplasma pneumoniae
- tuberculosis
- orf (1)
- vitamin deficiencies:
- niacin
- A
- C
- inflammatory disorders:
- collagen vascular diseases
- inflammatory bowel disease
- local allergic reactions
- pregnancy
- post-radiation therapy
Reference: