  We apply the dressing method to a string solution given by a static string
wrapped around the equator of a three-sphere and find that the result is the
single spike solution recently discussed in the literature. Further application
of the method allows the construction of solutions with multiple spikes. In
particular we construct the solution describing the scattering of two single
spikes and compute the scattering phase shift. As a function of the dressing
parameters, the result is exactly the same as the one for the giant magnon, up
to non-logarithmic terms. This suggests that the single spikes should be
described by an integrable spin chain closely related to the one associated to
the giant magnons. The field theory interpretation of such spin chain however
is still unclear.
