Hi. Greetings. In women, Anaemia, hormonal issues, environmental factors , pollution, stress, junk food and poor diet could cause you to lose hair. After adequate evaluation by dermatologist, You'll probably need treatment with hair care lotions or serums - something that has vasodilator properties and improves thickness of hair and reduces hair loss. Have a good balanced nutritious diet.For dandruff and small pimples on forehead, you'll need an antifungal shampoo. See a dermatologist near you to get evaluated if you have any other scalp problem. Hope this helps. Further queries may be sent on follow up  messaging. Warm regards. Dr Govind Suresh Mittal, Bangalore.