Weakness, dizziness and vomiting may be heatstroke, but also may be cerebral vascular spasm, cervical spondylosis, etc., and should be promptly consulted to find out the cause. 1. Heatstroke: Symptoms include profuse sweating, thirst, obvious fatigue, weakness, dizziness, chest tightness, urge to vomit, lack of concentration, numbness of limbs, etc. 2. Cerebral vasospasm: This symptom may be followed by persistent pain. 2. Cerebral vasospasm: this symptom is followed by persistent pain, or it can be episodic. When dizziness occurs, there are black eyes, dizziness and unsteadiness, accompanied by pale face, cold sweat, drop in blood pressure and thin pulse. 3. Cervical spondylosis: the main symptoms include neck and back pain, upper limb weakness, numbness of fingers, lower limb weakness, difficulty in walking, dizziness, nausea, and even blurred vision, tachycardia and difficulty in swallowing. In addition to the above factors, other factors cannot be ruled out. It is recommended that patients go to the hospital for examination as soon as possible, and give targeted treatment after the doctor clarifies the cause.