Cerebral palsy (CP) is a heterogeneous group of permanent, nonprogressive clinical syndromes that are characterized by motor and postural dysfunction. In the case of your child, your major concern as i can make out is stiffness of muscles, medically called as spasticity. Medications and/or surgery may help to reduce spasticity although they do not improve weakness and incoordination. I have listed down a few clinically proven beneficial therapies for the same. 1. Botulinum toxin — Injection of botulinum toxin type A (BTX A) into affected muscles decreases tone by limiting muscle contraction. It is injected into several areas of the muscle. Injections must be repeated every three to eight months to maintain the effect 2. Oral antispastic drugs — Benzodiazepines (diazepam), dantrolene, and baclofen have been used by some clinicians to treat spasticity in CP but are generally less useful than BTX. . 3. Intrathecal Baclofen - It involves giving the drug directly in the spine (CSF) to achieve higher drug levels and better response. 4. Selective dorsal rhizotomy and deep brain stimulation are some of the surgical therapies that have been tried with limited success. Remember, I have given you an overview of the available treatment options. Final decision can be taken by your neurologist after assessing the functional limitations and extent of disease. The pain will also subside once his muscles relax and stiffness is decreased.