Hi i'm a 23 year old girl, i've been having muscle twitches in my right thigh and knee for about a week now only when relaxing could it be als?

Twitching: ALS unlikely check electrolytes,sodium potassium, calcium. Check Vit D and magnesium, iron. Decrease caffeine or energy drink intake get enough sleep follow up with doctor/urgent care.

Anything: this is either a muscle fatigue or a dehydration and lack of magnesuin or potasuim, drink a plenty of water eat or drink food or drink that are rich in MG and K like orange juice or banana take NSAIDS like aleve (naproxen) use a heat pad and rest not better see your doctor

NOT ALS: Might wonder about meralgia paresthetica, nerve issue at hip, or even benign fasciculations. However, you do NOT have ALS, so relax.