Millipede burns are a cutaneous condition caused by some millipedes that secrete a toxic liquid that causes a brownish pigmentation or burn when it comes into contact with the skin. Some millipedes produce quinones in their defensive secretions, which have been reported to cause brown staining of the skin. See also
Centipede bite
Skin lesion

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The internal urethral sphincter (smooth muscle tissue) or the external urethral sphincter (striated muscle), levator ani (especially the pubococcygeus) muscle area, or some combination of the above, may be involved. It is possible that there is an inhibition of the detrusor command through a reflex pathway as well. The pontine micturition center (Barringtons nucleus) also may be involved, as its inhibition results in relaxation of the detrusor and prevents the relaxation of the internal sphincter. Diagnosis
The condition is catered for in the rules for mandatory urine testing for drugs in UK prisons, and UK Incapacity Benefit tribunals also recognise it. It is listed in the NHS on-line encyclopaedia of conditions and disorders. It is now reported to have been accepted as a valid reason for jury service excusal. From 1 August 2005, the guidance on the rules relating to the testing of those on probation in the UK cites paruresis as a valid reason for inability to produce a sample which is not to be construed as a refusal.The condition is recognised by the American Urological Association, who include it in their on-line directory of conditions.Paruresis was described in section 300.23 of the DSM-IV-TR as "performance fears . . . using a public restroom" but it was not mentioned by name.