编辑同志:我妈刚发现自己的拇指两个指节中间肿了起来,不痛也不痒的,之前也没有碰伤过。我摸了一下,感觉像长了个包,请问这是什么问题,严重吗?西宁古××古读者:拇指两个指节中间长了个包,没有疼痛、外伤史,这很有可能是出现了腱鞘囊肿。腱鞘囊肿是发生在腱鞘或关节囊附近的囊性肿物,它是关节囊周围结缔组织退变所致的一种病症。囊肿里面一般含有无色透明或淡黄色的浓稠黏液,多发于腕背和足背部。 Edit comrades: My mother just found his thumb in the middle of the two knuckles up, no pain or itch, had not touched before. I feel a bit like a bag, what is the problem, serious? Xining Ancient ×× ancient readers: the thumb two knuckles in the middle of a long package, no pain, history of trauma, which is most likely A ganglion cyst appears. Ganglion cysts are cystic masses that occur near the tendon sheath or joint capsule, a condition caused by the degeneration of connective tissue around the joint capsule. Cyst which usually contains colorless, transparent or light yellow thick mucus, mainly in the wrist and dorsal foot.