Dense, clustered pimples on the forehead and neck area are usually a form of acne caused by excess oil, sweat, hormonal changes, or friction from hair, collars, or helmets. Management includes gentle skin care and appropriate medication: wash the area twice daily with a mild cleanser, avoid oily creams or hair products touching the skin, and do not squeeze pimples as it can worsen scarring. Over-the-counter treatments like Benzoyl Peroxide or Adapalene can help reduce pimples and prevent new ones, while a doctor may prescribe antibiotics or other medicines if the acne is severe or persistent. Keeping the skin clean and dry, managing stress, and following a balanced diet with less oily and sugary foods may also help improve the condition. If it does not improve in a few weeks or keeps recurring, consult a dermatologist for proper evaluation and long-term treatment.