There are more reasons for unexplained swelling of the ankle, which may be related to sprains, rheumatoid arthritis, idiopathic edema and so on.
1. Sprain: It may be a mild sprain of the ankle caused by activities, so it was not noticed at that time. It is aggravated by sustained exercise and appears as swelling of the ankle.
2. Rheumatoid arthritis: It may be related to infection, causing immune response, which can be triggered when the weather is cold and wet. It causes inflammation in different parts of the joints, manifested by redness, swelling and pain.
3. Idiopathic edema: it may be related to neuropsychiatric factors, endocrine factors, dietary factors and so on. Edema is often aggravated by standing for a long time or eating too much sodium, and lower limb edema is obvious.
Unexplained swelling of the ankle can also be seen in other reasons, it is recommended to consult a doctor in a timely manner, comply with the doctor’s instructions to carry out relevant examinations, with the help of the doctor to clarify the cause, and targeted treatment or treatment.