Final answer:
Tendinitis is inflammation of a tendon that occurs due to overextension or overuse. Treatment involves rest, the use of NSAIDs, and other interventions to reduce inflammation and pain.
Step-by-step explanation:
Tendinitis is inflammation of a tendon that occurs when it is over-extended or worked too hard without rest. Treatment typically includes the PRICE guidelines (protection, rest, ice, compression, and elevation) and the use of non-steroidal anti-inflammatory drugs (NSAIDs) to reduce inflammation and pain. Rest is crucial to allow the tendon to heal and recover. Physical or occupational therapy may also be recommended for a faster return to normal activity levels.