Q My hearing has deteriorated slightly in that I often mishear people. Is it necessary to have a hearing test in one's mid-thirties and could this be linked to iPod use? If so, are traditional over-the-ear headphones less harmful than in-ear types? AP from west London
A Damage to your hearing can be caused by overexposure to loud music. The Royal National Institute for Deaf People (RNID) recommends noise-cancelling over-the-ears headphones, rather than sheer volume, to block out external noise. If you prefer the in-ear kind, a noise-isolating design is best. Visit the RNID's website at www.dontlosethemusic. com or take its hearing test by calling 0845 600 5555.
Q Since last year, I have suffered increasing cramp attacks in my calf, especially during or after a game of tennis. What is your advice? MA, via e-mail
A Calf cramps are common - and about 40% of people who get leg cramps have an attack at least three times per week. Keep exercising but make sure you warm up well. Stretch your calf muscles for five minutes three times a day, including before bed. If your cramps ease off, you can reduce the stretching exercises. A quinine tablet at night can help. Drink plenty of fluids and eat a healthy, nutritious diet.
Q I'm a man in my late thirties troubled by poor circulation; my hands and feet get cold at this time of year. Can I do anything more sophisticated than swinging my arms to help? MH from Brighton
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A It sounds as if you have Raynaud's phenomenon, which affects up to 10m people in the UK. The small blood vessels in the fingers and toes are more sensitive than usual and overreact to cold temperatures by narrowing. Tests can help to rule out a secondary cause such as scleroderma or rheumatoid arthritis. For milder symptoms, ensure you quit smoking and avoid draughts and changes in temperature. Prescription drugs available include vasodilators. Many sufferers swear by vitamins and other supplements. Visit www.raynauds.org.uk .
All questions are answered by a practising doctor. To consult Dr Know, e-mail drknow@sunday-times.co.uk . E-mails cannot be answered individually