Symptoms begin after a female tick attaches to the skin and has fed for 5-7 days. Symptoms may include numbness and tingling in the face and limbs, fatigue, weakness, irritability, restlessness or muscle pains. Over several hours or days, this can progress to unsteady balance and then complete paralysis (affecting the whole body) starting from the legs and moving upwards, or partial paralysis (affecting only one body part, e.g. an arm or leg). Other features include double vision and difficulty swallowing and speaking.