Symmetrical bruising of the big toe on both feet may be caused by improper shoes, high-intensity push-up exercise, ingrown toenails, etc. 1. Considering that you have worn small shoes or shoes with narrow toes for a long time, your big toe will be squeezed for a long time, leading to capillary rupture and bleeding in the toenail, resulting in bruises, which are often accompanied by swelling and pain. Generally speaking, if you put on the right shoes and soak your feet in hot water to promote the absorption of the bruises, you can improve the condition on your own. 2. If you do high-intensity push-ups, it will lead to excessive force on the big toe and symmetrical bruising and oozing. In this case, you need to stop the push-up exercise, and at the same time hot compresses on the affected area. 3. If the patient has ingrown toenails on both big toes, this can lead to rupture of blood vessels in the skin around the nail, resulting in bruising. Trimming and disinfecting are sufficient for minor cases, while anti-inflammatory treatment is required for severe cases, and nail extraction is necessary. If the patient has more severe pain and swelling and other symptoms, it is recommended to consult a doctor for examination and treatment after clarifying the cause.