If the water pressure is very reduced and humble in your shower it may be due to lime-scale build up. Always try to keep your shower heads clean, at least every three months. If the scale is too bad it may be a better idea to get either a new hose, or a new shower head.
The simplest but sometimes the most stubborn clogs are hairs. Occasionally, hair will collect at the drain, but more often, it will be deep inside the pipes. Problems can often be stopped here by installing a supplemental screen in the drain to prevent any hair from passing through.
To prevent any unexpected issue, Certified Plumbers at Ray Plumbing Company can assure proper maintenance of your home plumbing service.