Cactus thorns stuck in the flesh usually do not disappear on their own. Cactus thorns are foreign objects that the body will recoil from, so they will not absorb and heal on their own.
When cactus thorns remain in the body, there are usually two outcomes. In one case, the thorns are small and distributed near the epidermis. Due to the immune response, the organism will wrap the thorns and granulation tissue may grow around them, gradually forming a scar, but the thorns may remain in the flesh for a long time, causing pain. In the other case, the thorns are larger and more numerous, even piercing into the inside of the organism, especially near the nerves and bones, and local infection will form, triggering suppuration around them, which may lead to necrotic changes of blood vessels, bones and muscles in serious cases.
In daily life, patients should avoid touching the cactus with their hands or other parts of the body, when there are thorns into the body should be promptly pulled out, disinfection, if the thorns stuck in the flesh is larger or more, they can not deal with the need to go to the hospital surgery in a timely manner, the professional physician to give symptomatic treatment.