I've had it before. Here's what to do: wear an arm/wrist brace (wherever the pain is, arm or wrist), to stabilize the tendon, and take Orudis (Ketoprofen)- an Anti-inflammatory that works way better then Motrin (Ibuprofen). Either get a doctor's RX for it or use OTC at least 75mg per dose. Worked great for me. Take w/food if your tummy is sensitive.