Because the symptoms of Lyme disease are so varied, and can mimic many other disorders, and because the blood tests for it on humans are quite unreliable, there's lots of worry about it, much of it needless. We have Lyme disease in California, but only about 1% of ticks there carry it....not sure what the percentage is in France...and it's a somewhat different tick species in California---nonetheless, here are some things to keep in mind:
The tick must be attached at least 24 hours (probably rather longer) for it to transmit the disease;
The borrelia (the cause of the disease) lives in the midgut of the tick, so avoid squeezing the tick when you remove it, to avoid injecting the tick's midgut contents into the victim;
The characteristic 'target lesion'
, (or 'bull's-eye lesion')which indicates one has indeed been infected, appears after 3 days at earliest (typically more like 7 days, but up to 30 days). An immediate bee-sting-like or mosquito-bite-like reaction is not
typically a 'target lesion', and if you get such an immediate reaction you should consider yourself lucky, since it can call immediate attention to the critter;
Although most ticks are easily visible, some are tiny, and if you do develop a 'target lesion', seek medical attention;
A study a few years ago in the New England Journal of Medicine reported that a one-time treatment with 200 mg. of doxycycline was as effective as longer antibiotic courses, if you do get a 'target lesion'--the antibiotic should be taken promptly if such a lesion appears;
Although leaving the tick's head embedded is nasty, it's not really dangerous--digging for it is painful and frustrating, and although cutting the head parts out may be gratifying, it's unnecessary--it'll eventually probably work its way out, though this may take some time;
The easiest method for removal, in my experience, is to use one of the little plastic slotted-fork gizmos, sold by vets and in most pharmacies....opinions vary as to whether twisting the tick with the device is necessary....I just pull straight out, slowly but firmly, after having slipped the device well under the tick. It usually will let go without breaking. I enjoy flushing them down the toilet....