Hair loss can be due to several factors such as stress, unhealthy diet, or hormone variations. It's normal for humans to shed up to 100 strands of hair daily. But if it's a lot more than usual, you might notice bald spots or thinner hair. Eating well, calming your mind, and using hair products that are not too harsh may help to prevent hair loss. 

Several factors can cause black lumps. It's sometimes a self-resolving harmless blood blister that happens when you accidentally bite your lip or something more serious like skin cancer. Anyway, always be alert to the piece of the lump being uncomfortable, bloody, or growing in size. It's better to seek counseling from a physician to be cautious.

Yellowish nails indicate a fungal infection . Consult a dermatologist . . . . 

 

You may have something referred to as a perianal abscess. When bacteria infect a tiny gland around the anus, this can cause a painful lump. Soaking in warm water may help relieve discomfort. Don’t squeeze or pop it—try to keep the area clean instead. If it becomes worse or doesn’t get better, you should go see your doctor for more help.

A friction burn on the­ penis head can make it re­d and uncomfortable, especially if se­men touches it. Howeve­r, the risk of developing anti-spe­rm antibodies from this is low. To aid healing, ke­ep the area cle­an and avoid further irritation. If you notice any unusual symptoms or concerns, it's always wise­ to seek medical advice­.