These are both common symptoms if someone sustains a concussion.
After a brain injury, our sensory systems can become overloaded and sensitive to both light and/or sound. As the brain is having to use energy to heal due to the concussion, it takes extra energy to process bright lights and loud noises.
This is why complex environments (such as the mall, supermarkets, etc) that have bright lights and lots of noise can be overwhelming, because it overwhelms the brain and nervous system. As a result, people with concussion can become very fatigued as the body is trying to process so much all at once.
If you are sensitive to light, try wearing sunglasses or a cap where you know there will be bright light, both indoors and outdoors as needed. You can also try coloured lenses, such as blue light glasses which at times can help with headaches.
If you are sensitive to noise, try using earplugs or earmuffs/noise cancelling headphones to help reduce the intensity of sound in complex environments.
Theses are switch stratergies which can help alleviate symptoms, however it is important that you are working with your therapy team to treat these symptoms. Such as vision exericises or desensitisation programmes for noise.