After the surgery for trichiasis, scars may remain in the eyelid area. However, because the skin on the eyelids has a strong healing ability, the scars usually are not conspicuous. Trichiasis is usually caused by a spasm in the orbicularis oculi muscle inside the eyelid, leading to entropion. Eyelashes poking toward the corneal tissue scratch the corneal epithelium with each blink, causing redness, eye pain, foreign body sensation, photophobia, and tearing. If not treated promptly, it can easily lead to keratitis and may form scars within the corneal tissue, reducing corneal transparency and thus affecting the patient’s vision. Treatment typically requires surgery to remove excess loose skin on the eyelids and to eliminate part of the spasmodic orbicularis oculi muscle, returning the eyelid to its normal position and alleviating the symptoms.