Anesthesia effects???

I had surgery about 3 weeks ago and was under anesthesia for a couple of hours. My hair seems to have a completely different texture than before surgery. It seems brittle. Does anesthesia affect us like this?
Although all types of anesthesia involve some risk, major side effects and complications from anesthesia are uncommon. Your specific risks depend on your health, the type of anesthesia used, and your response to anesthesia.

Personal risk factors
Your age may be a risk factor. In general, the risks associated with anesthesia and surgery increase in older people.

Certain medical conditions, such as heart, circulation, or nervous system problems, increase your risk of complications from anesthesia.

Complications from local anesthesia
When used properly, local anesthetics are safe and have few major side effects. However, in high doses local anesthetics can have toxic effects caused by their being absorbed through the bloodstream into the rest of the body (systemic toxicity). This may significantly affect your breathing, heartbeat, blood pressure, and other body functions. Because of these potential toxic effects, equipment for emergency care must be immediately available when local anesthetics are used.

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