I just did a tattoo on a beauty spot can it transform into cancer i heard that :( ?

No cancer, bad idea: I am not aware that the pigmentation used in tattoos will induce cancer but once you have a tattoo over a mole it will be almost impossible to watch that mole should a cancer develop. Generally that's not a good idea.

Not so much: No, tattoos do not increase cancer risk. In fact, as a permanent sunscreen, they may reduce the risk slightly.

Increased risk: There is some theoretical concern that stimulating certain kinds of moles can increase its tendency to mutate into a malignant lesion. Traumatized or injured skin is also more prone to developing skin cancers. Covering the mole with a tattoo can also make it difficult to detect whether it's changing appearance and becoming cancerous.

Depends: If enough tumescent Lidocaine solution is used with the proper amount of sedatives and analgesics (pain killers) then it can be relatively painless. It's important to communicate with the doctor if you're in pain during the procedure if it's done under local. There is greater risk of complications under general anesthesia although you would not be conscious of any pain.

Complications uncommon: Complications are uncommon when done by an experienced practitioner. There can be many complications ranging from infection, bleeding, scarring, poor cosmetic result such as contour deformities, irregular surface, lumpiness, grooves, and even death. It is safer to have the procedure performed under local anesthesia. There is greater risk of adverse complications and death under general anesthesia.

Temporary disturbance: Laser pointers aimed at a person's eyes can cause temporary disturbance to vision. Sustained exposure may possibly cause some permanent damage. When pointed at an aircraft at night, it may distract pilots and cause an accident so there are laws to Prohibit and punish this kind of activity.

Many possibilities: Many possibilities including atopic dermatitis, acne rosacea, acne vulgaris, demodex folliculitis, contact dermatitis, irritant dermatitis. See a doctor or dermatologist for proper diagnosis and treatment.

Steroids and keratolytics: Topical steroids, tar, salicylic acid, urea, glycolic acid, calcipotriene (vitamin d cream), petrolatum can all be helpful in treating psoriasis, usually best when used in combination.