The cause of an overlapping toe may be hereditary or may develop as you get older. Overlapping toes are often associated with other foot issues, such as bunions and hammertoes.
Crooked toes can often be corrected by lifestyle strategies, such as choosing proper-fitting footwear and avoiding high heels. Orthopedic shoes may be recommended. If the crooked toe has become set or rigid, or if it doesn't respond to at-home treatment, surgery may be recommended.

Here's a great article on the subjet: What Causes Crooked Toes and How to Fix Them
At-home treatments, such as wearing a splint or toe spacer is the first step to take.
Here are recommended goSeamless products:
BUDIN TOE SPLINT TWO LOOPS (GS3015)
-
Aligns crooked and overlapping toes.
-
Provides alignment control and relief to the two adjacent hammertoes.
-
The soft durable pad cushions and protects the ball of the foot.
-
One per pack
Item: GS3015
One size fits all
BUDIN TOE SPLINT, ONE LOOP (GS3014)
-
Provides alignment control and relief to hammertoes.
-
The soft durable pad cushions and protects the ball of the foot area.
-
One per pack.
Item: GS3014
Size: One size fits all
FOAM TOE COMBS (GS3020)
-
The polyfoam toe comb can be worn on top or underneath toes and relieve pressure and friction.
-
The combs separate, cushion, and protect irritated or crooked toes.
-
Durable, washable, and reusable.
-
2 per pack
Item: GS3020
One size fits all
FOAM TOE SEPARATORS (GS3021)
-
Foam toe separator straightens and aligns toes and relieves pressure caused by bunions (hallux valgus deformities).
-
Hypoallergenic, washable, and reusable.
-
Designed with 3 layers of foam for durability.
-
2 per pack.
Item: GS3021*
Size: Small, Medium, Large & Extra Large
GEL TOE SEPARATORS (GS3093)
-
Traditional anatomical shape designed for standard footwear to minimize toe pressure
-
Fit comfortably between toes to absorb pressure
-
Helps reduce friction and irritation between toes
-
Helps relieve pain from soft corns, overlapping toes, nail problems, and bunions
-
Hypoallergenic, washable, and reusable
Item: GS3093
Size: Small, Large, Extra-large
GEL BUNION TOE SPREADER (GS1315)
-
Eases bunion pain and provides proper toe alignment
-
Reduces pressure on MP joint
-
Patent Pending design provides protection between the Hallux toe and shoe
-
Product easily slips over the Hallux toe
-
Washable and reusable
Item: GS1315
Size: One size fits all