Apart from diet and cosmetics there can be a few other reasons for a small rise in weight. Some patients unwittingly take chewing gum, throat pastilles, vitamin pills, cough syrups etc., without realizing that the sugar or fats they contain may interfere with a regular loss of weight. Sex hormones or cortisone in its various modern forms must be avoided, though oral contraceptives are permitted. In fact the only self-medication we allow is aspirin for a headache, though headaches almost invariably disappear after a week of treatment, particularly if of the migraine type.
Occasionally we allow a sleeping tablet or a tranquilizer, but patients should be told that while under treatment they need and may get less sleep. For instance, here in Italy where it is customary to sleep during the siesta which lasts from one to four in the afternoon most patients find that though they lie down they are unable to sleep.
We encourage swimming and sun bathing during treatment, but it should be remembered that a severe sunburn always produces a temporary rise in weight, evidently due to water retention. The same may be seen when a patient gets a common cold during treatment. Finally, the weight can temporarily increase – paradoxical though this may sound – after an exceptional physical exertion of long duration leading to a feeling of exhaustion. A game of tennis, a vigorous swim, a run, a ride on horseback or a round of golf do not have this effect; but a long trek, a day of skiing, rowing or cycling or dancing into the small hours usually result in a gain of weight on the following day, unless the patient is in perfect training. In patients coming from abroad, where they always use their cars, we often see this effect after a strenuous day of shopping on foot, sightseeing and visits to galleries and museums. Though the extra muscular effort involved does consume some additional Calories, this appears to be offset by the retention of water which the tired circulation cannot at once eliminate.
Source: Pounds and Inches by Dr. ATW Simeons