Tick paralysis is a loss of muscle function that results from a tick bite.
Hard-bodied and soft-bodied female ticks are believed to make a poison that can cause paralysis in children. Ticks attach to the skin to feed on blood. The poison enters the bloodstream during this feeding process.
The paralysis is ascending. That means it starts in the lower body and moves up.
Children with tick paralysis develop an unsteady gait followed several days later by weakness in the lower legs. This weakness gradually moves up to involve the upper limbs.
Paralysis may cause breathing difficulties, which may require the use of a breathing machine.
The child may also have mild, flu-like symptoms (muscle aches, tiredness).
Removing the tick removes the source of the poison. Recovery is rapid after the tick is removed.
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Full recovery is expected following the removal of the tick.
Breathing difficulties can cause respiratory failure. When this happens, the body's organs do not have enough oxygen to work well.
If your child suddenly becomes unsteady or weak, have the child examined right away. Breathing difficulties require emergency care.
Use insect repellents and protective clothing when in tick-infested areas. Tuck pant legs into socks. Carefully check the skin and hair after being outside and remove any ticks you find.
If you find a tick on your child, write the information down and keep it for several months. Many tick-borne diseases do not show symptoms right away, and you may forget the incident by the time your child becomes sick with a tick-borne disease.
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Aminoff MJ, So YT. Effects of toxins and physical agents on the nervous system. In: Jankovic J, Mazziotta JC, Pomeroy SL, Newman NJ, eds. Bradley and Daroff's Neurology in Clinical Practice. 8th ed. Philadelphia, PA: Elsevier; 2022:chap 86.
Bolgiano EB, Sexton J. Tickborne illnesses. In: Walls RM, Hockberger RS, Gausche-Hill M, eds. Rosen's Emergency Medicine: Concepts and Clinical Practice. 9th ed. Philadelphia, PA: Elsevier; 2018:chap 126.
Cummins GA, Traub SJ. Tick-borne diseases. In: Auerbach PS, Cushing TA, Harris NS, eds. Auerbach's Wilderness Medicine. 7th ed. Philadelphia, PA: Elsevier; 2017:chap 42.
Diaz JH. Ticks, including tick paralysis. In: Bennett JE, Dolin R, Blaser MJ, eds. Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases. 9th ed. Philadelphia, PA: Elsevier; 2020:chap 296.