post traumatic chest pain
if persist often warrants a chest X ray. Considering the fact that pain is persistent, aggravated by coughing or sneezing
, its worthwhile excluding any rib fracture
, dislocation or injury to the lung tissue. It shall be very unlikely that the trauma can exacerbate asthmatic symptoms.
However, visiting your physician to do a chest X ray to exclude any fracture of soft tissue
damage is advisable, since its going to give a good orientation to care and exclude unnecessary fears.