There are many causes of anal swelling, the common main anal canal inflammation, anal sinusitis and rectal mucosal prolapse, certain internal hemorrhoids oversized or acute edema period, can also be due to local pressure on the anus and produce a feeling of swelling. The symptoms disappear after resting in the anal region at night, most likely due to the relaxation of the rectal mucosa or over-enlarged internal hemorrhoids.
Due to the daytime, by gravity, the pressure of the anus is often the largest, at this time the rectal mucosa due to relaxation, or excessive hypertrophy of the internal hemorrhoids, there is a possibility of outward prolapse, oppression of the anal opening, the formation of anal distension. Rest at night, gravity reduces, rectal mucosa relaxation and prolapse gradually alleviate, hypertrophy of internal hemorrhoids also retraction, anal pressure reduction, swelling feeling disappears.
On the next day, it will be affected by gravity again, and there will be a series of problems such as prolapse, prolapse, pressure, swelling, and so on, so there is the phenomenon of anal swelling, and the symptoms disappear after resting at night.
Therefore, if the above symptoms occur, it is recommended to go to a specialized hospital for a clear diagnosis, which needs to be further examined by anal finger diagnosis and electronic anoscopy to clarify the cause of the disease and then take active treatment measures.