Seek urgent veterinary care if your Pug collapses, faints, has marked difficulty breathing, shows sudden severe weakness, has a painful or swollen limb, cannot stand, or develops a sudden major change in awareness or behavior. These signs may be associated with a serious heart, orthopedic, neurologic, or other medical problem and should not be monitored at home.
For changes that are milder but persistent, such as a recurring limp, stiffness after rest, reluctance to jump or climb stairs, lower exercise tolerance, coughing, or a change in appetite or energy, book a veterinary appointment promptly. Your veterinarian can examine your Pug, review their history, and decide whether imaging, heart evaluation, or other tests are appropriate.
Until you have advice, keep activity calm, prevent jumping or rough play if your dog appears painful, and do not give over-the-counter human medication. Make note of when the signs started, what makes them better or worse, and any family-health information you have.