Disclaimer: I'm not a qualified physician. The information on this page comes from books, journals, web sites, conversations with medics and a couple of decades in the sport.
The (US) National Athletic Trainers' Association conducted a Study that pinpoints Likely Injuries To High School Volleyball Players
As I find more time I'll add to this section. Until then the following parts marked with a ‡ will be in note form.
NSAID Non-Steroidal Anti-Inflammatory Drugs
RICE Rest Ice Compression Elevation
This effects people who have used their muscles at a level significantly above their regular level. Particularly beginners, infrequent players, seasonal players, or players that are returning to the game after not playing for a while.
This seems to be on overexertion beyond what your body is used to.
Muscle tissue is damaged at a very fine level, The repair mechanism involves pushing more blood into the area which causes inflammation and heat, both of these activate pain signals in the nerves. The new tissue takes time to become elastic which leads to a few days of muscle stiffness.
Lactic acid build up does not seem to play any role in this as it usually returns to normal levels an hour or so after exercise.
Warm ups, stretching, ultrasound and massage do not appear to help much with prevention or recovery.
None - it'll clear on its own - but do yourself a favour and give it time to clear before returning to training.
With regular exercise and a gradual increase of training intensity, DOMS reduces and eventually stops.
This is can present itself as a shooting pain or a burning sensation from the front of the foot. Sometimes there is also numbness. The pain may happen when the foot is made to bear weight and sometimes during the removal of a shoe. The pain may not stop after removing the shoe.
This is caused by the thickening of the soft tissue around where a nerve splits into separate channels for the toes. The most common location is just forward of the ball of the foot and between the 3rd and 4th toes. Sometimes the thickening is a reaction to this area being compressed from the sides by over-tight shoes, but there are many reasons why this nerve can be repeatedly 'pinched', not all of which have yet been identified. Normally this junction is the size of a grain of rice, but once thickening starts this area can become the size of the little finger nail.
The symptoms can often be made to reappear by squeezing the spot where the nerves split. But diagnosis is difficult and may need a MRI scan although this is not always conclusive.
Rest and wear shoes that are wide fitting around the ball of the foot, loosen the shoe laces around the bottom few holes. Pads in the shoe can move the pressure away from the painful spot. Anti-inflammatory drugs may also help but if the pain is severe or persistent you will need to see a doctor. The earlier this condition is diagnosed and treatment starts the less drastic the treatment.
Remove the cause or irritation to this area, which may be as simple as wearing less tight shoes. It may be possible to stop it re-occurring by changing the forces on this area of the foot using pads and tapes.
Back of the heel has some very tender swelling.
Swelling at the back of the heel this may be warm, red, tough and tender. You may need to exclude bone fractures Achilles tendonitis and rupture of the Achilles tendon.
The Achilles tendon comes down over the back of the leg, over the heel bone (AKA the Calcaneus) and connects almost underneath it. Where the tendon passes over the bone is a small fluid filled 'pad' (called a bursa) that prevents the tendon rubbing against the bone. When over-stressed the bursa becomes inflamed - a condition called bursitis. And once inflamed then pressure or movement are painful. The bursa may inflate over night and be very painful for half an hour after rising.
Start with a couple of weeks rest, ice packs (if the area is warm) and NSAIDs. Special pads added to the shoe can also help. Continue with the treatment until the condition improves, if it does not improve or only partially improves then consult a doctor.
Poor footwear and overuse are contributory factors as is age. In some cases the inflammation may be caused arthritis or even a bacterial infection. Prevention is depends on being able to identify the cause.
This is one of the least popular volleyball injuries.
There are varying degrees of sprain. How far the ankle turned over and how much force was behind it, determines which ligaments and tendons got torn and how much they got torn.
In my experience of volleyball I've not seen the most serious ankle sprain, where the ligament has snapped and the ankle is almost floppy. So I'll just cover a light and medium sprain.
In a light sprain there is minor or no swelling, mild pain, the joint is stable but it's uncomfortable to put weight on the foot.
This is usually the result of: slippery floor, loose fitting shoes, over reach etc.
In a medium sprain, there may be a lot of swelling (though not always), a lot of pain, the joint is fairly unstable and the player does not react joyfully to the joint being tested for stability. As painful as it is, it may become even more painful after a few hours or the following day. (I've been able to limp off court with a medium sprain, get half an hour of RICE and a couple of hours later to be unable to put any load on it such that I spent the next 2 days hopping.)
The medium sprain is almost always due to one person lading on another persons foot near the net. And most of the time (but not ALL of the time) it's because the set is closer to the net than normal. The spiker runs in and gets closer to the net than normal such that their foot is over the central line. The blocker, who's motion does not require running towards the net, is the one to get injured, landing on the spiker's foot.
Not taking off the shoe. This may be a good idea in an uncontrolled environment, where it would be a serious problem if the ankle swells and the shoe/boot can not be put back. In an environment like a gym, leaving the shoe on, prevents proper diagnosis and prevents the ability to apply ice. Only leave the shoe on if the patient needs to continue walking on the foot before reaching treatment.
This does not come about often, but I've seen: 2 players both moving for the same ball and banging their heads together, One player get hit by the elbow of a team mate while blocking and players getting hit in the head from a spike or a serve.